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1
Thoma, K., P. A. Baker, and E. B. Allender. "Design Methods for the Development of Wastewater Land Disposal Systems." Water Science and Technology 27, no. 1 (January 1, 1993): 77–86. http://dx.doi.org/10.2166/wst.1993.0020.
Повний текст джерелаАнотація:
Recent changes in legislation governing water quality management of receiving water bodies have led to a reappraisal of wastewater land disposal techniques. However, more stringent regulations have also necessitated the development of a multi-disciplinary planning approach, to ensure that land based wastewater disposal is functionally and environmentally sustainable in the long-term. Of principal concern are the long term impact of nutrients, salt and other potential contaminants on the soils of the receiving site and on downstream water quality. Assessment of hydrological, soil physical and geological characteristics, together with civil construction and service considerations, assist in the determination of receiving-site selection, application area and balance storage volume, irrigation method, environmental monitoring system specification etc. Analysis and interpretation of wastewater and soil chemical characteristics determines the pre-application water treatment required, and aliows long-term monitoring of the effect of wastewater disposal on the receiving-site soils. Two case-studies are presented. One describes the planning and design of a recently commissioned land-disposal system using industrial wastewater from a chemical process plant to irrigate a Eucalypt plantation in western metropolitan Melbourne. The other reports on the on-going assessment and planning of a large-scale land-disposal system proposed to accommodate the treated sewage effluent from a large north-west Victorian regional city.
2
Dobbie, Meredith Frances. "Typing Colonial Perceptions of Carrum Carrum Swamp: The Expected and the Surprising." Land 11, no. 2 (February 18, 2022): 311. http://dx.doi.org/10.3390/land11020311.
Повний текст джерелаАнотація:
Carrum Carrum Swamp was a vast wetland to the south-east of Melbourne, Victoria, Australia, at the time that it was first sighted by white colonists in 1803. By 1878, the colonists had commenced converting the swamp to dry land for agricultural and horticultural pursuits, and 100 years later it was predominantly residential land. Shifting values in the 1970s led to environmental concerns about water quality in local creeks and Port Phillip Bay and subsequent residential development on the former swamp included the construction of stormwater treatment wetlands. Perceptions of wetlands are now diverse, including positive perceptions that support their presence in urban settings. In contrast, traditionally, wetlands have been perceived negatively, as waste lands, leading to their drainage. Nevertheless, alternative, perhaps positive, perceptions could have existed, only to be overwhelmed by the negative perceptions driving drainage. Understanding the full range of past perceptions is important to ensure that the historical record is correct and to provide historical context to contemporary perceptions of wetlands. It will better equip natural resource managers and designers and managers of constructed wetlands in urban locations to ensure that wetlands are healthy, functioning and appreciated by their local and wider communities. Thus, the perceptions of Carrum Carrum Swamp by colonists from 1803 to 1878 were examined through qualitative content analysis of historical documents, and a typology was developed. Seven different perceptions were identified: scientific, premodern, exploitative, romantic, aesthetic, medico-mythic and ecological. Most could be traced to the colonists’ predominantly British heritage, but one perception arose in the colony in response to the specific environmental conditions that the colonists encountered. This ecological perception valued wetlands as places of predictable water supply in a land of unpredictable rainfall. It recognised wetlands as part of a broader hydrological system, with influences on the local climate. Its proponents promoted the need for a different approach to the management of wetlands than in Britain and Europe. Nevertheless, a dominant exploitative perception prevailed, leading to the drainage of Carrum Carrum Swamp. The typology developed in this study will be useful for exploring perceptions of other wetlands, both colonial and contemporary.
3
Sethuraman, Kannan, and Devanath Tirupati. "Melbourne Pathology." Asian Case Research Journal 11, no. 01 (June 2007): 141–59. http://dx.doi.org/10.1142/s0218927507000850.
Повний текст джерелаАнотація:
Melbourne Pathology, a subsidiary of Sonic Health Care, provided a comprehensive range of pathology services as an aid in the diagnosis and treatment of patients in Melbourne and Central Victoria. In a capped funding and highly regulated market such as the pathology service market in Australia, the only way in which the sales of a provider could grow was usually at the expense of another provider. To combat this situation, Melbourne Pathology opted to compete by providing higher quality service and faster turnaround time. The recent results of Melbourne Pathology, however, indicated that although the average turnaround time was within the promised targets, significant percentage of jobs in routine category and over 10% of jobs in the urgent category failed to meet the established targets. The case is primarily intended to illustrate the impact of demand distortions in a service setting that arise due to lack of coordination among various entities in the service value chain and a failure to have an integrated perspective that aligns all departments towards a common goal. This phenomenon is similar to the bullwhip effect in supply chains of manufactured products which has received considerable attention during the past decade. The case provides opportunities for students to develop corrective actions to mitigate this problem.
4
Walter, Susan M. "Victorian Bluestone: a proposed Global Heritage Stone Province from Australia." Geological Society, London, Special Publications 486, no. 1 (September 20, 2018): 7–31. http://dx.doi.org/10.1144/sp486.1.
Повний текст джерелаАнотація:
AbstractVictorian Bluestone is proposed as a Global Heritage Stone Province from Australia. Numerous heritage stones occur within this province and of these Malmsbury Bluestone is suggested as a Global Heritage Stone Resource. Bluestone, an iconic basalt dimension stone from Victoria, is used domestically and internationally with a recognized heritage value. Sources are located in urban and country areas of Victoria some of which are still utilized for dimension stone. In many instances bluestone has superior technical characteristics, including durability, that surpass high-quality commercial sandstones, despite an architectural preference for lighter-coloured stones. These characteristics are matched by the diversity of significant uses for domestic, commercial and infrastructure purposes especially in Victoria. Notable examples include the Spotswood Pumping Station, Malmsbury Viaduct, the Graving Dock (Williamstown), Malmsbury Reservoir, St Patrick's Cathedral (Melbourne), Kyneton Railway Station and Ararat Gaol. If the bluestone used in pavements and drains is also considered, Victorian Bluestone could be described as Australia's most prominent infrastructure heritage stone. Bluestone use in Melbourne dates from the 1840s, in the other states of Australia and in New Zealand from 1873, with international interest from Asia between 1860 and 1880. The stone continues to be utilized widely around Australia and is also exported.
5
Machiwa, Praxeda K. "Water quality management and sustainability: the experience of Lake Victoria Environmental Management Project (LVEMP)––Tanzania." Physics and Chemistry of the Earth, Parts A/B/C 28, no. 20-27 (January 2003): 1111–15. http://dx.doi.org/10.1016/j.pce.2003.08.032.
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Poiani, A. "Reproductive biology of the bell miner (Manorina melanophrys) (Meliphagidae) at Healsville, south-eastern Victoria." Wildlife Research 20, no. 5 (1993): 579. http://dx.doi.org/10.1071/wr9930579.
Повний текст джерелаАнотація:
The breeding biology of the bell miner (Manorina melanophrys, Meliphagidae) at a site 60 km east of Melbourne, Victoria, is described. Bell miners showed a clear seasonal pattern of nesting, moulting and development of brood patch. Increased food availability and number of helpers were not associated with increased nesting success. This is partially explained by increased predation on nests in colonies with more helpers. Growth rates of nestlings did not increase with increased number of helpers and habitat quality, although these variables may affect postfledging survival rates. Breeding females organised into neighbourhoods seemed to be able to synchronise nesting. Egg shape differed among females but egg size did not, although egg volume increased as the breeding season progressed.
7
Paterson, John. "Water Management and Recreational Values; Some Cases in Victoria, Australia." Water Science and Technology 21, no. 2 (February 1, 1989): 1–12. http://dx.doi.org/10.2166/wst.1989.0021.
Повний текст джерелаАнотація:
The growing recognition of recreational and amenity demands on water systems introduces a multitude of issues, many of them complex, to the established tasks of water quality management and water management generally. Victorian case studies are presented. They (1) illustrate the range and diversity of situations that can arise in managing competition and enhancing compatibility between traditional water supply objectives and recreational demands. (2) Fluctuation of storage levels, essential to storage operations, detract from recreational value. Recreational and tourism demands upon Lake Hume have grown to threaten traditional operating flexibility. (3) Mokoan is another such instance, but with its supply function in a state of flux, Lake Mokoan provides more scope for a shift in the balance. (4) Salinity management has become an issue in the management of lakes and wetlands when water supply interests and environmental/recreation interests respectively have different perspectives on salt disposal. (5) Recreational use of town supply sources has long been a vexed issue, although marked shifts in the attitudues of many supply authorities have occurred in recent years. (6) Eutrophication of lakes and estuaries raises difficult issues of responsibility and scientific uncertainty, and the water management connection may be tenuous but will attract public attention. (7) The water body attributes valued by specialised recreational interests require definition in terms that water managers can deal with using routine techniques of systems analysis and evaluation. (8) The demands of the fish population and anglers introduce a new perspective in river management and perceptions of instream values are changing markedly. (9) Direct costs of recreational services supplied by water authorities are not fully accounted: allocation choices and fiscal incidence will emerge as issues of significance. (10) These case studies raise only a fraction of the total range of matters that will, in the years to come, tax the technology and political skills of governments and management.
8
Maher, Michelle, and Emer Campbell. "Demonstrating environmental water needs in a climate of change." Proceedings of the Royal Society of Victoria 122, no. 2 (2010): 70. http://dx.doi.org/10.1071/rs10016.
Повний текст джерелаАнотація:
Efficient and accountable management of water resources in Northern Victoria has become a critical issue for the future of irrigation, communities and the environment, both north and south of the Great Dividing Range. To increase efficiencies and enhance accountability for water resource use, the Victorian Government is investing $1 billion through the Northern Victoria Irrigation Renewal Project (NVIRP) to upgrade ageing irrigation infrastructure across the Goulburn-Murray Irrigation District. The upgrade is expected to generate an additional 225 GL of water that will be distributed equally between irrigators, the environment and Melbourne. Whilst there are significant potential benefits for the environment as a whole from the water savings initiatives, there may also be adverse impacts from altering the hydrology of the diverse array of wetlands and rivers which are directly linked to the irrigation delivery network. The NVIRP Environmental Referrals process has investigated these potential impacts and identified ten wetlands and four rivers of high environmental value that require the development of environmental watering plans. These plans are the primary means by which the NVIRP commitment to ‘no net environmental loss’ will be achieved and assets of high environmental value will be protected. Three Environmental Watering Plans (EWPs) were completed prior to the operation of NVIRP works in the 2009-2010 irrigation season. These are for Johnson Swamp, Lake Elizabeth and Lake Murphy. The paper will describe the development of the Lake Elizabeth EWPs by the North Central Catchment Management Authority (NCCMA), within the context of uncertain climatic conditions, the recent long drought and the need to demonstrate accountability and efficiency in the use of a scarce and finite resource.
9
Makalila, Shadrack. "Community Initiatives in Water Quality Management in Simiyu Wetland in the Lake Victoria Basin, Tanzania." JOURNAL OF THE GEOGRAPHICAL ASSOCIATION OF TANZANIA 34 (July 10, 2021): 114–27. http://dx.doi.org/10.56279/jgat.v34i.87.
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GAVRILESCU, Elena, and Gilda Diana BUZATU. "Water Quality of Some Lakes in Dolj County." Bulletin of University of Agricultural Sciences and Veterinary Medicine Cluj-Napoca. Agriculture 70, no. 2 (November 25, 2013): 370–76. http://dx.doi.org/10.15835/buasvmcn-agr:9679.
Повний текст джерелаАнотація:
In Dolj County there are a number of lakes that are particularly important, because they have a large quantity of water, some of them originating from hydrotechnical accumulations, and other from natural waters. In the present study, it was performed the monitoring of the water quality of the lakes in Dolj County, in the year of 2012, namely: Victoria - Geormane, BistreÅ£ and Caraula. The ecological conditions of the natural and artificial lakes was established based on the state of acidification, of the oxygen regime (dissolved oxygen, biochemical oxygen demand and chemical oxygen demand), the degree of eutrophication (biogenic substances, phytoplankton biomass and chlorophyll “aâ€) and also based on transparency. The water samples were taken from three points: tail, middle and upstream of the lake and were analyzed using high performance equipment, namely: pH-meter, spectrophotometer DR 2010, Sechi disc, BOD5 system. In terms of the degree of eutrophication, the water from the studied lakes belongs to the third category of water quality. Geormane is a natural lake which has a very good ecological status, except regarding the eutrophication, which is considerably visible. Bistret lake has a good environmental status and is visible eutrophic. Caraula lake’s water belongs to the third category of water quality, being heavily eutrophic.
11
Jovanelly, Tamie J., Julie Johnson-Pynn, James Okot-Okumu, Richard Nyenje, and Emily Namaganda. "Pioneering water quality data on the Lake Victoria watershed: effects on human health." Journal of Water and Health 13, no. 3 (June 8, 2015): 920–30. http://dx.doi.org/10.2166/wh.2015.001.
Повний текст джерелаАнотація:
Four forest reserves within 50 km of Kampala in Uganda act as a critical buffer to the Lake Victoria watershed and habitat for local populations. Over a 9-month period we capture a pioneering water quality data set that illustrates ecosystem health through the implementation of a water quality index (WQI). The WQI was calculated using field and laboratory data that reflect measured physical and chemical parameters (pH, dissolved oxygen, biological oxygen on demand, nitrates, phosphates, fecal coliform, and temperature turbidity). Overall, the WQI for the four forest reserves reflect poor to medium water quality. Results compared with US Environmental Protection Agency and World Health Organization drinking water standards indicate varying levels of contamination at most sites and all designated drinking water sources, with signatures of elevated nitrates, phosphates, and/or fecal coliforms. As critical health problems are known to arise with elevated exposure to contaminants in drinking water, this data set can be used to communicate necessary improvements within the watershed.
12
Shi, Baiqian, Peter M. Bach, Anna Lintern, Kefeng Zhang, Rhys A. Coleman, Leon Metzeling, David T. McCarthy, and Ana Deletic. "Understanding spatiotemporal variability of in-stream water quality in urban environments – A case study of Melbourne, Australia." Journal of Environmental Management 246 (September 2019): 203–13. http://dx.doi.org/10.1016/j.jenvman.2019.06.006.
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13
Opere, Wasonga Michael, Maingi John, and Omwoyo Ombori. "Occurrence of Enteric Viruses in Surface Water and the Relationship with Changes in Season and Physical Water Quality Dynamics." Advances in Virology 2020 (July 3, 2020): 1–11. http://dx.doi.org/10.1155/2020/9062041.
Повний текст джерелаАнотація:
Environmental water quality issues have dominated global discourse and studies over the past five decades. Significant parameters of environmental water quality include changes in biological and physical parameters. Some of the biological parameters of significance include occurrence of enteric viruses. Enteric viruses can affect both human and animal’s health by causing diseases such as gastrointestinal and respiratory infections. In this study, the relationship between the occurrence of enteric viruses with reference to adenoviruses and enteroviruses and the physical water quality characteristics was assessed from water samples collected from Lake Victoria (LV) in Kenya. In order to understand the dynamics of season driven enteric viruses’ contamination of the lake waters, we additionally analysed seasonal behavior of the lake’s catchment area in terms of rainfall effects. Physical quality parameters were measured on-site while viral analysis was carried out by molecular methods using the nested polymerase chain reaction (nPCR). From 216 samples that were analysed for viral contamination, enteric viral genomes were discovered in 18 (8.3%) of the samples. Out of half of the samples (108) collected during the rainy season, enteric viral genomes were detected in 9.26% (10) while 8 (7.41%) samples tested positive from the other half of the samples (108) collected during the dry season. There was, however, no significant correlation noted between the physical water quality characteristics and the enteric viruses’ occurrence. Neither wet season nor dry season was significantly associated with the prevalence of the viruses. In Lake Victoria waters, most of the samples had an average of physical water quality parameters that were within the range accepted by the World Health Organization (WHO) for surface waters with exemption of turbidity which was above the recommended 5 NTU as recorded from some sampling sites. Continuous and long-term surveillance of the lake water to accurately monitor the contaminants and possible correlation between chemical, physical, and biological characteristics is recommended. This would be important in continuous understanding of the hydrological characteristics changes of the lake for proper management of its quality with reference to the WHO standards. A multiple varied-sampling approach in different geographical regions during different seasons is recommended to establish the geographical distribution and relatedness to seasonal distribution patterns of the viruses. The data generated from this study will be useful in providing a basis for assessment of seasonally driven fecal pollution load of the lake and enteric virus contamination for proper management of the sanitary situation around the lake.
14
Fletcher, T. D., and A. Deletic. "Statistical evaluation and optimisation of stormwater quality monitoring programmes." Water Science and Technology 56, no. 12 (December 1, 2007): 1–9. http://dx.doi.org/10.2166/wst.2007.744.
Повний текст джерелаАнотація:
This paper reports on a statistical review of a water quality monitoring programme aimed at estimating long-term pollutant loads discharged from waterways in and around Melbourne, Australia. Performance of the current programme was evaluated with respect to the required level of uncertainty to meet management objectives. Use of continuously measured turbidity was found to be an effective surrogate measure for estimating TSS, with errors in long-term load estimates of less than 5%. Where routine grab sampling was used instead, errors increased with sampling interval; a 3-day interval was required to maintain errors within 10% of the continuously measured load. For storm event sampling, auto-samplers were found not to be required, if only long-term load estimates are required. The importance of eliminating systematic errors, by ensuring frequent calibration and data verification, was demonstrated.
15
Spinks, Jean, Suzanne Phillips, Priscilla Robinson, and Paul Van Buynder. "Bushfires and tank rainwater quality: A cause for concern?" Journal of Water and Health 4, no. 1 (March 1, 2006): 21–28. http://dx.doi.org/10.2166/wh.2006.0001.
Повний текст джерелаАнотація:
In early 2003, after a prolonged drought period, extensive bushfires occurred in the east of Victoria affecting 1.5 million hectares of land. At the time, smoke and ash from bushfires, settling on roofs, contained pollutants that could potentially contaminate rainwater collected and stored in tanks for domestic use. The major concerns include polycyclic aromatic hydrocarbons (PAHs) from incomplete combustion of organic matter and arsenic from burnt copper chrome arsenate (CCA) treated wood. An increase in microbial contamination through altered nutrient levels was also hypothesised. A pilot study of 49 rainwater tank owners was undertaken in north-east Victoria. A rainwater tank sample was taken and analysed for a variety of parameters including organic compounds, microbiological indicators, metals, nutrients and physico-chemical parameters. A survey was administered concurrently. A number of results were outside the Australian Drinking Water Guideline (ADWG) values for metals and microbiological indicator organisms, but not for any tested organic compounds. PAHs and arsenic are unlikely to be elevated in rainwater tanks as a result of bushfires, but cadmium may be of concern.
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Radcliffe, J. C. "Evolution of water recycling in Australian cities since 2003." Water Science and Technology 62, no. 4 (August 1, 2010): 792–802. http://dx.doi.org/10.2166/wst.2010.362.
Повний текст джерелаАнотація:
The prolonged Australian drought which commenced in 2002, and the agreement between Australia's Commonwealth and States/Territories governments to progress water reform through the National Water Initiative, has resulted in many new recycling projects in Australia's capital cities. Dual reticulation systems are being advanced in new subdivision developments in Sydney, Melbourne and Adelaide. Brisbane has installed three large Advanced Water Treatment Plants that are designed to send indirect potable recycled water to the Wivenhoe Dam which is Brisbane's principal water reservoir. Numerous water recycling projects are serving industry and agriculture. Experimental managed aquifer recharge is being undertaken with wetland-treated stormwater in Adelaide and reverse osmosis treated wastewater in Perth. New National Water Quality Management Strategy recycled water guidelines have been developed for managing environmental risks, for augmentation of drinking water supplies, for managed aquifer recharge and for stormwater harvesting and reuse. Many recent investments are part-supported through Commonwealth government grants. Desalination plants are being established in Melbourne and Adelaide and a second one in Perth in addition to the newly-operational plants in Perth, South-East Queensland and Sydney. Despite there being numerous examples of unplanned indirect potable recycling, most governments remain reluctant about moving towards planned potable recycling. There is evidence of some policy bans still being maintained by governments but the National Water Commission continues to reinforce the necessity of an even-handed objective consideration of all water supply options.
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Campbell, Susan. "So long as it's near water: variable roosting behaviour of the large-footed myotis (Myotis macropus)." Australian Journal of Zoology 57, no. 2 (2009): 89. http://dx.doi.org/10.1071/zo09006.
Повний текст джерелаАнотація:
The choice of day roosts by microbats influences energetics, social interactions and breeding success. In Australia, the large-footed myotis (Myotis macropus) is dependent on waterways for foraging. However, the extent to which the species relies upon, and selects roosts within, riparian habitat is unknown. I studied the roosting behaviour of this species around a water reservoir near Melbourne, Victoria, during the summers from October 2002 to April 2005. I radio-tracked 31 bats to 17 tree roosts; colony size averaged 6.0 ± 1.6 bats and individuals used 1.3 ± 0.1 roosts during the tracking period (average 6.2 ± 0.6 days). Two roosts were also located in crevices in an old aqueduct tunnel, housing colonies of 10.8 ± 0.6 bats. Colonies emerged earlier from tunnel crevices (25.0 ± 3.6 min after sunset, range 6–53 min), compared with conspecifics in tree roosts (45.6 ± 2.1 min after sunset, range 10–83 min). Roost trees and cavities differed from available habitat trees and cavities in terms of smaller entrance areas to used (182.2 ± 49.3 cm2) versus unused (328.0 ± 61.8 cm2) cavities. The primary force driving roost selection by M. macropus appears to be proximity of suitable waterways for foraging. Retention and maintenance of extensive riparian habitat, as well as the preservation of other structures used for roosting, are the most important conservation strategies for management of the day-roosting habitat of M. macropus.
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Banadda, E. N., F. Kansiime, M. Kigobe, M. Kizza, and I. Nhapi. "Landuse-based nonpoint source pollution: a threat to water quality in Murchison Bay, Uganda." Water Policy 11, S1 (March 1, 2009): 94–105. http://dx.doi.org/10.2166/wp.2009.106.
Повний текст джерелаАнотація:
Murchison Bay in Lake Victoria is the main water source for Kampala City (Uganda) but is also the recipient for the wastewater discharged from the city. The objective of this paper is to trace the main landuse-based pollution sources within Kampala City borders and around Murchison Bay as a means to develop methods and systems to protect and preserve the aquatic environment and, from the lessons learned, to highlight what is considered to be an appropriate and sustainable approach for Uganda. This paper shows that Uganda needs to set realistic local standards, offer affordable services, set time frameworks, streamline politics, nurture and develop institutions, divide institutional responsibilities, educate her people and learn from the success stories to reverse the negative impacts on the water quality in Murchison Bay.
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Taylor, Chris, and David B. Lindenmayer. "The use of spatial data and satellite information in legal compliance and planning in forest management." PLOS ONE 17, no. 7 (July 27, 2022): e0267959. http://dx.doi.org/10.1371/journal.pone.0267959.
Повний текст джерелаАнотація:
A key part of native forest management in designated wood production areas is identifying locations which must be exempt from logging. Forest laws, government regulations, and codes of practice specify where logging is and is not permitted. Assessing compliance with these regulations is critical but can be expensive and time consuming, especially if it entails field measurements. In some cases, spatial data products may help reduce the costs and increase the transparency of assessing compliance. However, different spatial products can vary in their accuracy and resolution, leading to uncertainty in forest management. We present the results of a detailed case study investigating the compliance of logging operations with laws preventing cutting on slopes exceeding 30°. We focused on two designated water catchments in the Australian State of Victoria which supply water to the city of Melbourne. We compared slopes that had been logged on steep terrain using spatial data based on a Digital Elevation Model (DEM) derived from LiDAR, a 1 arc second DEM derived from the Shuttle Radar Topography Mission, and a Digital Terrain Model (DTM) with a resolution of 10m. While our analyses revealed differences in slope measurements among the different spatial products, all three datasets (and the on-site slope measurements) estimated the occurrence of widespread logging of forests on slopes >30° in both water catchments. We found the lowest resolution Shuttle Radar Topography Mission DEM underestimated the steepness of slopes, whilst the DTM was variable in its estimates. As expected, the LiDAR generated slope calculations provided the best fit with on-site measurements. Our study demonstrates the value of spatial data products in assessing compliance with logging laws and codes of practice. We suggest that LiDAR DEMs, and DTMs also can be useful in proactive forest planning and management by helping better identify which areas should be exempt from cutting before logging operations commence.
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Jayasuriya, L. N. N., N. Kadurupokune, M. Othman, and K. Jesse. "Contributing to the sustainable use of stormwater: the role of pervious pavements." Water Science and Technology 56, no. 12 (December 1, 2007): 69–75. http://dx.doi.org/10.2166/wst.2007.753.
Повний текст джерелаАнотація:
The city of Melbourne, Australia is experiencing a water crisis with potable water storage reservoirs at an all time low. With increasing urbanisation there is an ever increasing need to research and explore sustainable water management initiatives. There is potential to minimise the negative impacts of stormwater runoff and augment dwindling supplies of potable water through adoption of pervious paving technology. The traditional approach to stormwater management has focused on constructing drainage networks to carry stormwater away from developed areas as quickly as possible to avoid the risk of flooding. The main aim of this research project was to establish relationships between rainfall intensity, infiltration rate and pervious pavement runoff and to examine the improvement to stormwater quality after infiltrating through pervious pavements. This paper describes the laboratory experiment set-up to determine the infiltration patterns and stormwater quality improvement for simulated storms precipitating on pervious pavements. Next, the scaling-up of the experimental rig to a field-based trial is explained. Preliminary results from this work are presented to demonstrate the potential benefits of pervious pavements in the Australian landscape.
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Kanda, Edwin K., Job R. Kosgei, and Emmanuel C. Kipkorir. "Simulation of organic carbon loading using MIKE 11 model: a case of River Nzoia, Kenya." Water Practice and Technology 10, no. 2 (June 1, 2015): 298–304. http://dx.doi.org/10.2166/wpt.2015.035.
Повний текст джерелаАнотація:
River Nzoia is the largest river draining into the Kenyan portion of Lake Victoria. This river receives both point sources of pollution from industrial and municipal wastes, and non-point sources from agricultural runoff in the catchment. The objective of this study was to simulate dissolved oxygen (DO) and biochemical oxygen demand (BOD) of the middle section of River Nzoia using MIKE 11 model. The model was calibrated using discharge and water quality data for 2009 and validated with March–April 2013 data. The model performance was good with coefficient of determination (R2) values of between 0.845 and 0.995, Nash–Sutcliffe efficiency values of between 0.748 and 0.993 and percent bias of less than 10 for both calibration and validation of electrical conductivity (EC), DO and BOD. EC and BOD values were lower for April compared to March which could be attributed to dilution during high flows. DO values were above the recommended minimum level of 4 mg/l in all the sections of the river in the wet period but some sections had lower than 4 mg/l during low flow period. The government agencies such as Water Resources Management Authority and National Environment Management Authority should enforce the effluent standards to ensure that industries and wastewater treatment plants adhere to the maximum allowable limit for BOD and also improve their treatment efficiencies of wastewater plants so as to improve the quality of River Nzoia which is important in the overall management of the Lake Victoria basin.
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Bach, Peter M., David T. McCarthy, Christian Urich, Robert Sitzenfrei, Manfred Kleidorfer, Wolfgang Rauch, and Ana Deletic. "A planning algorithm for quantifying decentralised water management opportunities in urban environments." Water Science and Technology 68, no. 8 (October 1, 2013): 1857–65. http://dx.doi.org/10.2166/wst.2013.437.
Повний текст джерелаАнотація:
With global change bringing about greater challenges for the resilient planning and management of urban water infrastructure, research has been invested in the development of a strategic planning tool, DAnCE4Water. The tool models how urban and societal changes impact the development of centralised and decentralised (distributed) water infrastructure. An algorithm for rigorous assessment of suitable decentralised stormwater management options in the model is presented and tested on a local Melbourne catchment. Following detailed spatial representation algorithms (defined by planning rules), the model assesses numerous stormwater options to meet water quality targets at a variety of spatial scales. A multi-criteria assessment algorithm is used to find top-ranking solutions (which meet a specific treatment performance for a user-defined percentage of catchment imperviousness). A toolbox of five stormwater technologies (infiltration systems, surface wetlands, bioretention systems, ponds and swales) is featured. Parameters that set the algorithm's flexibility to develop possible management options are assessed and evaluated. Results are expressed in terms of ‘utilisation’, which characterises the frequency of use of different technologies across the top-ranking options (bioretention being the most versatile). Initial results highlight the importance of selecting a suitable spatial resolution and providing the model with enough flexibility for coming up with different technology combinations. The generic nature of the model enables its application to other urban areas (e.g. different catchments, local municipal regions or entire cities).
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Mullenger, J., G. Ryan, and J. Hearn. "A water authority's experience with HACCP." Water Supply 2, no. 5-6 (December 1, 2002): 149–55. http://dx.doi.org/10.2166/ws.2002.0163.
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South East Water Limited (SEWL) is one of three retail water authorities operating in Melbourne, Australia. It was the first water authority in Australia to obtain HACCP accreditation for the supply of drinking water, in November 1999. This article presents an overview of the first two years' experience in developing and establishing a food safety management plan using Codex Alimentarius Hazard Analysis and Critical Control Points (HACCP) to ensure the water reaching customers is safe, aesthetically pleasant and meets operating licence requirements. HACCP has improved the way in which our distribution and reticulation systems are managed, primarily through the refinement and optimisation of standard operating procedures. In addition, more consideration has been given to the development of contingency plans and the appropriate use of system redundancy to ensure quality of supply. Accreditation was only the beginning of a process. Once attained, there was an ongoing need to maintain and refine hazard measurement and reduction procedures. The major challenge for SEWL has been the integration of HACCP company-wide. Spreading of HACCP was directly achieved through the involvement of operators, key personnel and subcontractors in the assessment of hazards and evaluating the appropriateness of critical control points. This not only assisted with improvements to the existing system, and the identification of system strengths and weaknesses, but was also an integral component in awareness training for HACCP. It was through assessment workshops and training that operators were able to see HACCP as primarily a summary of current practices, but with the focus of improving or maintaining water quality. The net benefits of HACCP are difficult to quantify. Overall there is a greater understanding of water quality issues, more streamlined work procedures, and an improved response to customer enquires relating to water quality. This has been most clearly demonstrated by a net decrease in customer complaints over the two years since HACCP was implemented.
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Gichuki, John, Reuben Omondi, Priscillar Boera, Tom Okorut, Ally Said Matano, Tsuma Jembe, and Ayub Ofulla. "Water HyacinthEichhornia crassipes(Mart.) Solms-Laubach Dynamics and Succession in the Nyanza Gulf of Lake Victoria (East Africa): Implications for Water Quality and Biodiversity Conservation." Scientific World Journal 2012 (2012): 1–10. http://dx.doi.org/10.1100/2012/106429.
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This study, conducted in Nyanza Gulf of Lake Victoria, assessed ecological succession and dynamic status of water hyacinth. Results show that water hyacinth is the genesis of macrophyte succession. On establishment, water hyacinth mats are first invaded by native emergent macrophytes,Ipomoea aquaticaForsk., andEnydra fluctuansLour., during early stages of succession. This is followed by hippo grassVossia cuspidata(Roxb.) Griff. in mid- and late stages whose population peaks during climax stages of succession with concomitant decrease in water hyacinth biomass. Hippo grass depends on water hyacinth for buoyancy, anchorage, and nutrients. The study concludes that macrophyte succession alters aquatic biodiversity and that, since water hyacinth infestation and attendant succession are a symptom of broader watershed management and pollution problems, aquatic macrophyte control should include reduction of nutrient loads and implementing multifaceted approach that incorporates biological agents, mechanical/manual control with utilization of harvested weed for cottage industry by local communities.
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Atazadeh, Ehsan, Andrew Barton, and Jafar Razeghi. "Importance of environmental flows in the Wimmera catchment, Southeast Australia." Limnological Review 20, no. 4 (December 1, 2020): 185–98. http://dx.doi.org/10.2478/limre-2020-0018.
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Abstract In this paper the environment, climate, vegetation, indigenous and European settlement history, stream flow patterns, water quality and water resources development in western Victoria, Australia are studied. The last part of the paper focuses on the MacKenzie River, a tributary of the Wimmera River located on the northern slopes of the Grampians Ranges in western Victoria, Australia. Water release along the MacKenzie River was regulated to improve water quality, stream condition and river health especially in the downstream reaches. The upstream section tends to receive water most days of the year due to releases to secure the requirements of water supply for the city of Horsham and its recreational and conservation values, which is diverted into Mt Zero Channel. Below this the middle and downstream sections receive a more intermittent supply. Annually, a total of 10,000 dam3 of water is released from Wartook Reservoir into the MacKenzie River. Of this volume, only about 4,000 dam3 was released explicitly for environmental purposes. The remaining 6,000 dam3 was released to meet consumptive demands and to transfer water to downstream reservoirs. The empirical data and models showed the lower reaches of the river to be in poor condition under low flows, but this condition improved under flows of 35 dam3 per day, as indicated. The results are presented to tailor discharge and duration of the river flows by amalgamation of consumptive and environmental flows to improve the condition of the stream, thereby supplementing the flows dedicated to environmental outcomes. Ultimately the findings can be used by management to configure consumptive flows that would enhance the ecological condition of the MacKenzie River.
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Surapaneni, A., and K. A. Olsson. "Sodification under conjunctive water use in the Shepparton Irrigation Region of northern Victoria: a review." Australian Journal of Experimental Agriculture 42, no. 3 (2002): 249. http://dx.doi.org/10.1071/ea00179.
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The Shepparton Irrigation Region Land and Water Salinity Management Plan promotes groundwater pumping and re-use for irrigation where groundwater quality and availability allow dilution with channel water (‘conjunctive water use’) to levels that produce minimal production losses from annual and perennial pastures used widely for dairying. In addition, municipal and industrial waste waters are used on a smaller scale for irrigating pastures (and crops). An upper level of irrigation water salinity (expressed as an electrical conductivity of 0.8 dS/m) is currently recommended in the plan. This recommendation is based on empirical data from experiments on unstocked, perennial pasture collected over 2 decades on red-brown earths in the region. While the strategy has, so far, achieved acceptable control of soil salinity levels, while generally maintaining pasture yields, a concern that ‘conjunctive water use’ may not be sustainable in the long term arises from the sodicity of the groundwater and waste waters. The continual addition of sodium to clay soils, initially low in both sodium and electrolytes (upper 0.5 m depth), risks the soils becoming sodified, with attendant soil physical problems should salts be leached to below threshold electrolyte concentrations, as in winter for example. We show that clay soils supporting pastures in the Shepparton Irrigation Region sodify with time under ‘conjunctive water use’. We review evidence for adverse effects of such sodification on soil physical properties affecting plant productivity and hydrologic processes important in the long-term sustainability of the strategy. On-farm management implications of the strategy are discussed and important issues for research are identified.
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Ghofrani, Zahra, Victor Sposito, and Robert Faggian. "Designing a Pond and Evaluating its Impact Upon Storm-Water Quality and Flow: A Case Study in Rural Australia." Ecological Chemistry and Engineering S 26, no. 3 (September 1, 2019): 475–91. http://dx.doi.org/10.1515/eces-2019-0036.
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Abstract Storm-water management is a common concern in rural catchments where development-related growth causes increases of storm-water flows. Greater magnitude and frequency of storm-water create greater challenges for mitigating storm-water damage and improving water quality. The concept of Blue-Green Infrastructure (BGI) as a solution incorporates a wide range of applicable components with the aim of minimizing the effect of catchment development on flow regimes without changing the watershed morphology. BGI components manage storm-water by decreasing impermeable cover and expanding natural and semi-natural systems to store water or recharge and filter storm-water into the ground. In this paper, guidelines for designing a pond as a component of BGI are provided and, configuration and size of the pond are determined. Moreover, the impacts of the designed pond on storm-water peak flow and quality are assessed for the Tarwin catchment, State of Victoria, Australia. The results indicate that the introduction of the pond would have reduced outfall inflow by 94 % and would have achieved the reduction of 88.3, 75.5 and 50.7 % for total suspended solids, total phosphorus, and total nitrogen respectively, during the extreme weather event in June 2012.
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Armstrong, D. P., J. E. Knee, P. T. Doyle, K. E. Pritchard, and O. A. Gyles. "Water-use efficiency on irrigated dairy farms in northern Victoria and southern New South Wales." Australian Journal of Experimental Agriculture 40, no. 5 (2000): 643. http://dx.doi.org/10.1071/ea99132.
Повний текст джерелаАнотація:
A survey of 170 randomly selected, irrigated, dairy farms in northern Victoria and 9 in southern New South Wales was conducted to examine and benchmark the key factors influencing water-use efficiency. Water-use efficiency was defined as the amount of milk (kg milk fat plus protein) produced from pasture per megalitre of water (irrigation plus effective rainfall). Information on water-use, milk production, supplementary feeding, farm size and type, pasture management, and irrigation layout and management was collected for each farm by personal interview for the 1994–95 and 1995–96 seasons. The farms were ranked in the order of water-use efficiency with the average farm compared with the highest and lowest 10% of farms. The range in water-use efficiency was 25–115 kg milk fat plus protein/ML, with the highest 10% averaging 94 kg/ML and the lowest 10% averaging 35 kg/ML. The large range in water-use efficiency indicated potential for substantial improvement on many farms. The high water-use efficiency farms, when compared with the low group: (i) produced a similar amount of milk from less water (387 v. 572 ML) (P<0.05), less land (48 v. 83 ha) (P< 0.05) and a similar number of cows (152 v. 143 cows); (ii) had higher estimated pasture consumption per hectare (11.5 v. 5.5 t DM/ha) (P<0.01) and per megalitre (1.0 v. 0.5 t DM/ML) (P<0.01); (iii) had higher stocking rates (3.2 v. 1.8 cows/ha) (P<0.01); (iv) used higher rates of nitrogen fertiliser (59 v. 18 kg N/ha.year) (P<0.05) and tended to use more phosphorus fertiliser (64 v. 34 kg P/ha.year) (P<0.10); (v) used similar levels of supplementary feed (872 v. 729 kg concentrates/cow); (vi) had higher milk production per cow (396 v. 277 kg fat plus protein) (P<0.05); and (vii) directed a higher proportion of the estimated energy consumed by cows into milk production (53 v. 46%) (P<0.05). The survey data confirmed that irrigated dairy farm systems are complex and variable. For example, the amount of feed brought in from outside the milking area varied from 0 to 74% of the estimated total energy used by a milking herd. There was a large range in the level of supplement input amongst the farms in the high water-use efficiency group, and in the low water-use efficiency group. This indicates that the management of the farming system has a greater impact on the efficiency of water-use on irrigated dairy farms, than the type of system. The data from the survey provide information for individual farms, a measure of the water-use efficiency of the industry, and an indication of the quality of regional land and water resources.
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Nicholson, E., J. Ryan, and D. Hodgkins. "Community data - where does the value lie? Assessing confidence limits of community collected water quality data." Water Science and Technology 45, no. 11 (June 1, 2002): 193–200. http://dx.doi.org/10.2166/wst.2002.0395.
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Waterwatch is a national community-based monitoring network that aims to involve community groups and individuals in the protection and management of waterways. Waterwatch Victoria has the dual objectives of catchment education and water quality monitoring. The educational outcomes are evident, with the Waterwatch programme facilitating over 9,000 students to monitor more than 2,000 sites in waterways in 2000. This paper aims to assess the scientific value of community-collected data, through examining differences between Waterwatch data and professionally collected data. The study looked at all aspects of volunteer data collection, including data confidence protocols, equipment, and data analysis. All professional data was collated by the Victorian Water Quality Monitoring Network (VWQMN). The parameters examined in this study were turbidity, electrical conductivity (EC), pH and total phosphorus. The level of agreement between community-collected data and professional data varied temporally and spatially. Waterwatch data for EC and pH appeared to be very similar to professionally collected data. Equipment used by Waterwatch volunteers for turbidity and total phosphorus appeared to be limited in accuracy to moderate ranges. Overall the VWQMN professionally collected data showed less variance, suggesting greater variability, potentially due to inaccuracies, in volunteer collected data.
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Guo, Danlu, Anna Lintern, J. Angus Webb, Dongryeol Ryu, Ulrike Bende-Michl, Shuci Liu, and Andrew William Western. "A data-based predictive model for spatiotemporal variability in stream water quality." Hydrology and Earth System Sciences 24, no. 2 (February 24, 2020): 827–47. http://dx.doi.org/10.5194/hess-24-827-2020.
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Abstract. Our current capacity to model stream water quality is limited – particularly at large spatial scales across multiple catchments. To address this, we developed a Bayesian hierarchical statistical model to simulate the spatiotemporal variability in stream water quality across the state of Victoria, Australia. The model was developed using monthly water quality monitoring data over 21 years and across 102 catchments (which span over 130 000 km2). The modeling focused on six key water quality constituents: total suspended solids (TSS), total phosphorus (TP), filterable reactive phosphorus (FRP), total Kjeldahl nitrogen (TKN), nitrate–nitrite (NOx) and electrical conductivity (EC). The model structure was informed by knowledge of the key factors driving water quality variation, which were identified in two preceding studies using the same dataset. Apart from FRP, which is hardly explained (19.9 %), the model explains 38.2 % (NOx) to 88.6 % (EC) of the total spatiotemporal variability in water quality. Across constituents, the model generally captures over half of the observed spatial variability; the temporal variability remains largely unexplained across all catchments, although long-term trends are well captured. The model is best used to predict proportional changes in water quality on a Box–Cox-transformed scale, but it can have substantial bias if used to predict absolute values for high concentrations. This model can assist catchment management by (1) identifying hot spots and hot moments for waterway pollution; (2) predicting the effects of catchment changes on water quality, e.g., urbanization or forestation; and (3) identifying and explaining major water quality trends and changes. Further model improvements should focus on the following: (1) alternative statistical model structures to improve fitting for truncated data (for constituents where a large amount of data fall below the detection limit); and (2) better representation of nonconservative constituents (e.g., FRP) by accounting for important biogeochemical processes.
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Dixit, Sunil K., and Murali Sambasivan. "A review of the Australian healthcare system: A policy perspective." SAGE Open Medicine 6 (January 1, 2018): 205031211876921. http://dx.doi.org/10.1177/2050312118769211.
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This article seeks to review the Australian healthcare system and compare it to similar systems in other countries to highlight the main issues and problems. A literature search for articles relating to the Australian and other developed countries’ healthcare systems was conducted by using Google and the library of Victoria University, Melbourne. Data from the websites of the Commonwealth of Australia, the Australian Institute of Health and Welfare, the Australian Productivity Commission, the Organisation for Economic Co-operation and Development and the World Bank have also been used. Although care within the Australian healthcare system is among the best in the world, there is a need to change the paradigm currently being used to measure the outcomes and allocate resources. The Australian healthcare system is potentially dealing with two main problems: (a) resource allocation, and (b) performance and patient outcomes improvements. An interdisciplinary research approach in the areas of performance measurement, quality and patient outcomes improvement could be adopted to discover new insights, by using the policy implementation error/efficiency and bureaucratic capacity. Hospital managers, executives and healthcare management practitioners could use an interdisciplinary approach to design new performance measurement models, in which financial performance, quality, healthcare and patient outcomes are blended in, for resource allocation and performance improvement. This article recommends that public policy implementation error and the bureaucratic capacity models be applied to healthcare to optimise the outcomes for the healthcare system in Australia. In addition, it highlights the need for evaluation of the current reimbursement method, freedom of choice to patients and a regular scrutiny of the appropriateness of care.
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Jacobs, J. L. "A survey on the effect of management techniques and pasture composition and quality at harvesting on silage quality on dairy farms in western Victoria." Australian Journal of Experimental Agriculture 38, no. 2 (1998): 139. http://dx.doi.org/10.1071/ea97120.
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Summary. Factors associated with silage quality were investigated on 140 dairy farms in western Victoria. The management factors measured were date of lock up, date cut, length of lock up, duration of wilting, raking and tedding during wilting period, rainfall during wilting period and the type of silage made. Pasture variables measured at harvesting included percentage composition (ryegrass, legume, other grasses and weeds), dry matter of pasture, metabolisable energy, crude protein, neutral detergent fibre and water-soluble carbohydrate of the pasture, and dry matter yield of the pasture. The average lock up time of pasture for silage was mid September, although the range was from late July to early November. The length of lock up varied from 16 to 91 days with a mean value of 49 days and pastures were on average harvested in early November. Ryegrass on average accounted for 61%, legumes and other grasses accounting for a further 15% each and weeds about 5%. The range in quality of pasture at harvesting was highlighted by the range in metabolisable energy (8.9–11.3 MJ/kg DM) and crude protein (10.2–20.4%) values. Wilting times varied from 0.5 to 15 days with the biggest range being observed in pastures used for baled silage. All factors were regressed against final silage metabolisable energy and crude protein. Factors which had the greatest effect on final silage metabolisable energy were date of cutting, length of lock up, type of silage, the interaction between type of silage and length of lock up, length of wilting and mechanical treatment during the wilting period. Final silage crude protein was most strongly associated with date of cutting, crude protein content of the pasture and mechanical treatment during the wilting period. Mechanical treatment during the wilting period had the greatest influence on silage quality. Other options to improve silage quality such as cutting earlier or reducing wilting periods may not be possible or economically viable.
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Mulanda Aura, Christopher, Chrisphine S. Nyamweya, James M. Njiru, Reuben Omondi, Julius Manyala, Safina Musa, Horace Owiti, et al. "Using the Multi-metric Index of Biotic Integrity methodological approach to determine the major river catchment that most pollutes a lake." Aquatic Ecosystem Health & Management 24, no. 1 (January 2, 2021): 12–20. http://dx.doi.org/10.14321/aehm.024.01.04.
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Abstract We present the Multi-metric Index of Biotic Integrity methodological approach that allows for the ranking of major river catchments based on pollution status in the Kenyan portion of Lake Victoria, Africa. The study has a broader applicability to all of Lake Victoria, other African Great Lakes, and all lakes that have riverine discharge. The method presented utilizes water quality and environmental data, local knowledge, and pre-existing literature. The parameters considered were sampled from 2016 to 2018 during the dry season (July sampling) and the wet season (March sampling). Separation power of Mann-Whitney U test (p < 0.05) qualified 11 discriminant metrics for both macroinvertebrate and fish samples into the scoring system of 1, 3 and 5 in the formulation of final Multi-metric Index of Biotic Integrity methodological approach. Rivers in the northern section had lower Multi-metric Index of Biotic Integrity methodological approach scores, as compared to southern counterparts. The Multi-metric Index of Biotic Integrity methodological approach ranking herein was validated by community perceptions on pollution levels. River Nzoia catchment emerged as the most polluted, followed by River Yala, River Kuja, and Sondu-Miriu. Siltation, domestic washing, litter and refuse emerged as the main agents of pollution. Management authorities ought to reinforce a balanced utilization of the vital water resources to minimize future impacts, and promote catchment wide practices that ensure ecological health sustainability of the lake ecosystem.
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Hunter, Barbara, Ruby Biezen, Karyn Alexander, Natalie Lumsden, Christine Hallinan, Anna Wood, Rita McMorrow, Julia Jones, Craig Nelson, and Jo-Anne Manski-Nankervis. "Future Health Today: codesign of an electronic chronic disease quality improvement tool for use in general practice using a service design approach." BMJ Open 10, no. 12 (December 2020): e040228. http://dx.doi.org/10.1136/bmjopen-2020-040228.
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ObjectiveTo codesign an electronic chronic disease quality improvement tool for use in general practice.DesignService design employing codesign strategies.SettingGeneral practice.ParticipantsSeventeen staff (general practitioners, nurses and practice managers) from general practice in metropolitan Melbourne and regional Victoria and five patients from metropolitan Melbourne.InterventionsCodesign sessions with general practice staff, using a service design approach, were conducted to explore key design criteria and functionality of the audit and feedback and clinical decision support tools. Think aloud interviews were conducted in which participants articulated their thoughts of the resulting Future Health Today (FHT) prototype as they used it. One codesign session was held with patients. Using inductive and deductive coding, content and thematic analyses explored the development of a new technological platform and factors influencing implementation of the platform.ResultsParticipants identified that the prototype needed to work within their existing workflow to facilitate automated patient recall and track patients with or at-risk of specific conditions. It needed to be simple, provide visual snapshots of information and easy access to relevant guidelines and facilitate quality improvement activities. Successful implementation may be supported by: accuracy of the algorithms in FHT and data held in the practice; the platform supporting planned and spontaneous interactions with patients; the ability to hide tools; links to Medicare Benefits Schedule; and prefilled management plans. Participating patients supported the use of the platform in general practice. They suggested that use of the platform demonstrates a high level of patient care and could increase patient confidence in health practitioners.ConclusionStudy participants worked together to design a platform that is clear, simple, accurate and useful and that sits within any given general practice setting. The resulting FHT platform is currently being piloted in general practices and will continue to be refined based on user feedback.
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Mchau, Geofrey J., Edna Makule, Revocatus Machunda, Yun Yun Gong, and Martin Kimanya. "Phycocyanin as a proxy for algal blooms in surface waters: case study of Ukerewe Island, Tanzania." Water Practice and Technology 14, no. 1 (January 8, 2019): 229–39. http://dx.doi.org/10.2166/wpt.2019.005.
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Abstract Knowledge of the parameters that contribute to water body eutrophication is essential for proper monitoring and management of water quality for human consumption. This study assessed water quality parameters in relation to phycocyanin (PC) as a proxy indicator for harmful algal blooms (HABs). Samples were collected from 23 water sources – lakes, wells, springs and boreholes – in selected villages, for six months. Parameters measured included temperature, pH, redox potential, dissolved oxygen, electrical conductivity, total dissolved solids, nitrate nitrogen, nitrite nitrogen, phosphorus, reactive phosphate and total chlorophyll, which were related to (PC) occurrence. The PC concentration detected in Lake Victoria ranged from 5 to 58.4 μg/l above the WHO alert level and exceeded that in other water sources by almost 30 μg/l (P < 0.001). Univariate relationship between water quality parameters and PC indicates association with temperature, redox potential, total chlorophyll, nitrate nitrogen, nitrite nitrogen, phosphate and reactive phosphorus (P < 0.001). The multivariate model indicates that redox potential, nitrate nitrogen and phosphorus are significant statistically (P < 0.05). A predictive model indicates that nitrate nitrogen and reactive phosphorus contribute significantly to PC occurrence whereby unit (1 mg/l) increases in these parameters increase PC by 9.55 and 4.38 μg/l (P < 0.05) respectively. This study demonstrates that water quality parameters can be used to predict increases in PC and hence as a proxy for HABs. It remains important to be able to classify algal blooms, to understand which species are present and their potential cyanotoxin production.
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Newell, GR, and BA Wilson. "The Relationship Between Cinnamon Fungus (Phytophthora Cinnamomi) and the Abundance of Antechinus Stuartii (Dasyuridae: Marsupialia) in the Brisbane Ranges, Victoria." Wildlife Research 20, no. 2 (1993): 251. http://dx.doi.org/10.1071/wr9930251.
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The Brisbane Ranges include areas of National Park, water catchment and freehold land that have a history of infection with the pathogen P. cinnamomi since the late 1960s. A systematic survey of the small-mammal fauna of the Brisbane Ranges National Park and the Geelong and District Water Board catchments in relation to the pathogen was carried out in 1987. A. stuartii was the only species trapped regularly. The volume of vegetation to a structural level of 60 cm was significantly lower at sites where P. cinnamomi was present. The abundance of A. stuartii was also significantly lower at sites infected with P. cinnamomi, and a significant relationship is shown between the capture rate of A. stuartii and the volume of vegetation present up to 40 cm above ground level. This work indicates a possible association between P. cinnamomi and populations of A. stuartii, and the relationships between the pathogen, habitat quality and small-mammal distribution are discussed. These findings have implications for public land management and management of fauna in areas prone to infection with P. cinnamomi.
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Zhang, Yan, Andrew Grant, Ashok Sharma, Donghui Chen, and Liang Chen. "Assessment of rainwater use and greywater reuse in high-rise buildings in a brownfield site." Water Science and Technology 60, no. 3 (July 1, 2009): 575–81. http://dx.doi.org/10.2166/wst.2009.364.
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This study describes the use of rainwater and greywater (originated from bathroom only) for provision of non-contact indoor and outdoor use in high-rise buildings. A brownfield development site in Box Hill suburb of Melbourne was selected as case study site for this investigation. The performance of alternative servicing options was compared with conventional water supply, stormwater and wastewater servicing. A water balance model UVQ (Urban Volume and Quality) was applied to determine storage capacities and to evaluate the percentage reduction in water supplying, stormwater run-off and wastewater disposal, as well as volumes of rainwater use and greywater reuse. In this study, the impact of variation in collection area (600 m2 and 900 m2) and appliance discharge volumes was examined. A number of demand management options were also investigated. The results of this study indicate greywater reuse is more suited than rainwater use for this development because of the steady, constant supply of greywater compared to the highly fluctuating, storm-event supply of rainwater and the high population density creating comparatively large volumes of greywater.
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Pollino, Carmel A., Pat Feehan, Michael R. Grace, and Barry T. Hart. "Fish communities and habitat changes in the highly modified Goulburn Catchment, Victoria, Australia." Marine and Freshwater Research 55, no. 8 (2004): 769. http://dx.doi.org/10.1071/mf03180.
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Evidence for the decline in native fish communities in the lowland Goulburn Catchment has been based primarily on studies investigating changes to environmental conditions as a result of river regulation. The present study aggregates historical fisheries data to spatially compare native fish communities in different parts of the catchment. Multivariate analyses demonstrate that distinctly different community compositions are found in different parts of the catchment. Eildon Dam, a deep release reservoir, has drastically altered the hydrology and water quality of the upper Goulburn River, and ordination analyses show that this has created both physical and artificial barriers to movement of native fish into the main channel. Concurrently, fisheries data from the upper main channel show the community is highly divergent compared to the remaining catchment. Further downstream, Goulburn Weir creates a barrier to fish movement between Lake Nagambie and the lower Goulburn Catchment, and alters the natural hydrological regime. Similarity Percentage analyses demonstrate that these stressors have facilitated the establishment of alien species, which dominate fish abundance in the upper and lower main channels. The current study emphasises the need to explore alternatives for improving management strategies to rehabilitate fish communities throughout the Goulburn Catchment.
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White, R. E., B. P. Christy, A. M. Ridley, A. E. Okom, S. R. Murphy, W. H. Johnston, D. L. Michalk, et al. "SGS Water Theme: influence of soil, pasture type and management on water use in grazing systems across the high rainfall zone of southern Australia." Australian Journal of Experimental Agriculture 43, no. 8 (2003): 907. http://dx.doi.org/10.1071/ea02239.
Повний текст джерелаАнотація:
Eleven experimental sites in the Sustainable Grazing Systems (SGS) national experiment were established in the high rainfall zone (HRZ, >600 mm/year) of Western Australia, Victoria and New South Wales to measure components of the water balance, and pathways of water movement, for a range of pastures from 1997 to 2001. The effect of widely spaced river red gums (Eucalyptus camaldulensis) in pasture, and of belts of plantation blue gums (E. globulus), was studied at 2 of the sites. The soil types tested ranged from Kurosols, Chromosols and Sodosols, with different subsoil permeabilities, to Hydrosols and Tenosols. The pasture types tested were kikuyu (Pennisetum clandestinum), phalaris (Phalaris aquatica), redgrass (Bothriochloa macra) and annual ryegrass (Lolium rigidum), with subterranean clover (Trifolium subterraneum) included. Management variables were set stocking v. rotational grazing, adjustable stocking rates, and level of fertiliser input. Soil, pasture and animal measurements were used to set parameters for the biophysical SGS pasture model, which simulated the long-term effects of soil, pasture type, grazing method and management on water use and movement, using as inputs daily weather data for 31 years from selected sites representing a range of climates. Measurements of mean maximum soil water deficit Sm were used to estimate the probability of surplus water occurring in winter, and the average amount of this surplus, which was highest (97–201 mm/year) for pastures in the cooler, winter-rainfall dominant regions of north-east and western Victoria and lowest (3–11 mm/year) in the warmer, lower rainfall regions of the eastern Riverina and Esperance, Western Australia. Kikuyu in Western Australia achieved the largest increase in Sm compared with annual pasture (55–71 mm), while increases due to phalaris were 18–45 mm, and those of native perennials were small and variable. Long-term model simulations suggested rooting depth was crucial in decreasing deep drainage, to about 50 mm/year for kikuyu rooting to 2.5 m, compared with 70–200 mm/year for annuals rooting to only 0.8 m. Plantation blue gums dried the soil profile to 5.25 m by an average of 400 mm more than kikuyu pasture, reducing the probability of winter surplus water to zero, and eliminating drainage below the root zone. Widely spaced river red gums had a much smaller effect on water use, and would need to number at least 14 trees per hectare to achieve extra soil drying of about 50 mm over a catchment. Soil type affected water use primarily through controlling the rooting depth of the vegetation, but it also changed the partitioning of surplus water between runoff and deep drainage. Strongly duplex soils such as Sodosols shed 50% or more surplus water as runoff, which is important for flushing streams, provided the water is of good quality. Grazing method and pasture management had only a marginal effect in increasing water use, but could have a positive effect on farm profitability through increased livestock production per hectare and improved persistence of perennial species.
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Worthington, E. Barton, and Rosemary Lowe-McConnell. "African Lakes Reviewed: Creation and Destruction of Biodiversity." Environmental Conservation 21, no. 3 (1994): 199–213. http://dx.doi.org/10.1017/s0376892900033166.
Повний текст джерелаАнотація:
The lakes of Africa provide outstanding examples of biodiversity. Some hundreds of species of aquatic fauna, especially fishes, have been created through evolution taking place in environments which became isolated from each other. The lakes also provide an outstanding example of the loss of biodiversity: in Lake Victoria at least 200 species of fish have almost certainly become extinct through human activities. These lakes have, since Mankind's origin in Africa, provided high-quality animal protein food and with improved management they could provide much more, which adds greatly to their scientific and economic interest.
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Wati, Satiya, Bret S. Robinson, John Mieog, Judy Blackbeard, and Alexandra R. Keegan. "Chlorine inactivation of coxsackievirus B5 in recycled water destined for non-potable reuse." Journal of Water and Health 17, no. 1 (September 25, 2018): 124–36. http://dx.doi.org/10.2166/wh.2018.393.
Повний текст джерелаАнотація:
Abstract Currently guidelines for disinfection of water with free chlorine, while primarily developed for potable water, are often used for virus disinfection of nitrified recycled water of >1 NTU (Nephelometric Turbidity Unit). More information is needed on the disinfection efficacy of free chlorine for viruses in waters of varying turbidity and pH due to significant reuse of treated wastewater of varying quality. In this study, disinfection efficacy in nitrified/denitrified activated sludge treated wastewater was investigated for coxsackievirus B5 (CB5), an enterovirus known to be highly resistant to free chlorine. The required chlorine contact times (CT) values (mg.min/L) for inactivation of CB5 were established in treated wastewater at 10 °C and of varying turbidity (0.2, 2, 5 and 20 NTU) and pH (7, 8 and 9). CTs were calculated to achieve 1 to 4 log10 inactivation. Robust data is presented in support of the chlorine CT values required to inactivate a chlorine-resistant virus in a range of turbidities and pHs in treated wastewaters. The testing method used a conservative approach and the data presented have been used to develop the free chlorine virus inactivation guildelines for recycled water in Victoria and South Australia, Australia.
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O'Leary, G. J., and D. J. Connor. "A simulation study of wheat crop response to water supply, nitrogen nutrition, stubble retention, and tillage." Australian Journal of Agricultural Research 49, no. 1 (1998): 11. http://dx.doi.org/10.1071/a97020.
Повний текст джерелаАнотація:
A series of simulations was made with a fallow{wheat crop simulation model to examine the effects of stubble retention and tillage on yield for 2 semi-arid environments in north-western Victoria over a 100-200-year period. The fallow treatments comprised 4 combinations of stubble management and tillage in 18-month-long fallows of a fallow{wheat rotation. The 2 sites are representative of the major soil types of the region: a chromic vertisol at Dooen and a calcic xerosol at Walpeup. Stubble retention had the greatest effect on yield, providing a median increase of 0·8 and 0·6 t/ha at Dooen and Walpeup, respectively. Zero tillage had an importantbut small advantage in the presence of stubble at Dooen (0·2 t/ha) and no significant advantage under any system at Walpeup. Yield response was primarily caused through increased fallow-stored water of approximately 89 and 25 mm at Dooen and Walpeup, respectively. The accumulation of soil mineral nitrogen (SMN) at sowing in fallows did not show the same treatment differences as with water or yield. There was a significant interaction between soil type and fallow method. At Dooen, stubble depressed SMN by about 24 kg N/ha (163{185 kg N/ha) below those without stubble (188-207 kg N/ha). Tillage reduced SMN with or without stubble by about 20 kg N/ha. At Walpeup, on the other hand, the highest SMN was associated with tillage and was enhanced by stubble, but the differences were small (<10 kg N/ha). Nitrogen fertiliser produced a small increase in yield (median 0·2 t/ha) at Dooen, increasing to about 0·4 t/ha in wetter years when stubble was retained and fallows were maintained with zero tillage. Over a 100-year period, nitrogen fertiliser reduced the rate of yield decline. The use of nitrogen fertiliser with stubble retention and zero tillage offers an opportunity for arresting declining yield and quality in intensive cropping systems in the Wimmera region of Victoria.
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Irwin, R., A. Surapaneni, D. Smith, J. Schmidt, H. Rigby, and S. R. Smith. "Verification of an alternative sludge treatment process for pathogen reduction at two wastewater treatment plants in Victoria, Australia." Journal of Water and Health 15, no. 4 (May 26, 2017): 626–37. http://dx.doi.org/10.2166/wh.2017.316.
Повний текст джерелаАнотація:
At South East Water wastewater treatment plants (WwTPs) in Victoria, Australia, biosolids are stockpiled for three years in compliance with the State guidelines to achieve the highest pathogen reduction grade (T1), suitable for unrestricted use in agriculture and landscaping. However, extended stockpiling is costly, may increase odour nuisance and greenhouse gas emissions, and reduces the fertiliser value of the biosolids. A verification programme of sampling and analysis for enteric pathogens was conducted at two WwTPs where sludge is treated by aerobic and anaerobic digestion, air drying (in drying pans or solar drying sheds) and stockpiling, to enumerate and, if present, monitor the decay of a range of enteric pathogens and parasites. The sludge treatment processes at both WwTPs achieved T1 grade biosolids with respect to prescribed pathogenic bacterial numbers (<1 Salmonella spp. 50 g−1 dry solids (DS) and <100 Escherichia coli g−1 DS) and >3 log10 enteric virus reduction after a storage period of one year. No Ascaris eggs were detected in the influent to the WwTPs, confirming previous studies that the presence of helminth infections in Victoria is extremely low and that Ascaris is not applicable as a control criterion for the microbiological quality of biosolids in the region.
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Riffkin, Penny A., Paul E. Quigley, Gavin A. Kearney, Fiona J. Cameron, Robert R. Gault, Mark B. Peoples, and Janice E. Thies. "Factors associated with biological nitrogen fixation in dairy pastures in south-western Victoria." Australian Journal of Agricultural Research 50, no. 2 (1999): 261. http://dx.doi.org/10.1071/a98035.
Повний текст джерелаАнотація:
A survey of 71 sites was conducted in the dairying districts of south-western Victoria in October 1994 to determine factors associated with nitrogen (N) fixation in white clover based pastures. Twenty-eight factors (environmental, microbiological, management, soil, and pasture) were considered in relation to 2 indicators of N fixation by white clover, %Ndfa (percentage of total plant N derived from the atmosphere, as determined by the 15N natural abundance method) and kg of N fixed per tonne herbage dry matter (legume and non-legume). On light-textured soils (sandy loams), soil potassium, rhizobia numbers, total soil N, and density of the nematode Pratylenchus sp. accounted for 72% of variation in %Ndfa. On medium-textured soils (clay loams), crude protein of perennial ryegrass and plant-available phosphorus in the soil accounted for 30% of variation in %Ndfa. The amount of N fixed was influenced by different factors, again depending on soil texture. Soil chemical properties accounted for 31% variation on the medium-textured soils with nematode density, pasture quality, and soil chemical properties accounting for 77% of variation on light-textured soils. Amounts of N fixed per tonne herbage dry matter produced averaged 8.2 kg on the light-textured soils and 7.3 kg on the medium-textured soils. Average %Ndfa values were 67% and 60% on light- and medium-textured soils, respectively. Effects of soil texture on N fixation were attributed to the different cation exchange and water-holding capacities of the soils and highlight the importance of considering soil type in N fixation studies.
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Onyango, Dancan O., Christopher O. Ikporukpo, John O. Taiwo, and Stephen B. Opiyo. "Monitoring the extent and impacts of watershed urban development in the Lake Victoria Basin, Kenya, using a combination of population dynamics, remote sensing and GIS techniques." Environmental & Socio-economic Studies 9, no. 2 (June 1, 2021): 11–25. http://dx.doi.org/10.2478/environ-2021-0007.
Повний текст джерелаАнотація:
Abstract Several urban centres of different sizes have developed over time, and continue to grow, within the basin of Lake Victoria. Uncontrolled urban development, especially along the lake shore, puts environmental pressure on Lake Victoria and its local ecosystem. This study sought to monitor the extent and impacts of urban development (as measured by population growth and built-up land use/land cover) in the Lake Victoria basin, Kenya, between 1978 and 2018. Remote sensing and GIS-based land use/land cover classification was conducted to extract change in built-up areas from Landsat 3, 4, 5 and 8 satellite imagery obtained for the month of January at intervals of ten years. Change in population distribution and density was analysed based on decadal census data from the Kenya National Bureau of Statistics between 1979 and 2019. A statistical regression model was then estimated to relate population growth to built-up area expansion. Results indicate that the basin’s built-up area has expanded by 97% between 1978 and 2018 while the population increased by 140% between 1979 and 2019. Urban development was attributed to the rapidly increasing population in the area as seen in a positive statistical correlation (R2=0.5744) between increase in built-up area and population growth. The resulting environmental pressure on the local ecosystem has been documented mainly in terms of degradation of lake water quality, eutrophication and aquatic biodiversity loss. The study recommends the enactment and implementation of appropriate eco-sensitive local legislation and policies for sustainable urban and rural land use planning in the area. This should aim to control and regulate urban expansion especially in the immediate shoreline areas of the lake and associated riparian zones.
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O'Connell, M. G., I. Goodwin, and G. M. Dunn. "Towards a better understanding of crop water requirement in orchards: a case study from the Goulburn Valley." Australian Journal of Experimental Agriculture 46, no. 3 (2006): 405. http://dx.doi.org/10.1071/ea04009.
Повний текст джерелаАнотація:
Responses of fruit trees to reduced irrigation in micro-irrigated peach and apple orchards in the Goulburn Valley, Victoria were investigated during the 2000–01 season. Field experiments examined the effects of applying 2 irrigation levels on soil water content, crop water relations, vegetative growth, yield, yield components and fruit quality. Irrigation regimes were 50% and 100% of current management practice where inputs are scheduled from pan evaporation and locally derived crop coefficients. Water was applied to only one side of the tree rootzone in the 50% treatment (0.5I) while the current management practice treatment (1.0I), received water on both sides of the tree. Over the season, the irrigation inputs for peach and apple equated to a crop coefficient of 0.93 and 0.87, respectively. Orchard water use (ETpeach and ETapple) was predicted using reference crop evapotranspiration (ET0) and published crop coefficients (Kc) with adjustment for the fraction of shade cast by the trees on the orchard floor at solar noon (effective canopy cover, ECC). Throughout the season, ECC measured as midday tree canopy radiation interception, remained low for both peach and apple (<35%). ETpeach and ETapple were substantially lower than current water scheduling practices (1.0I treatments). For the 0.5I apple regime, irrigation closely matched ETapple suggesting that these trees were adequately irrigated. This was supported by no detrimental effects on crop production, vegetative growth, and fruit quality measures of the 0.5I irrigation regime. However, in the peach orchard the 0.5I regime reduced fruit volume suggesting that these trees may have been water stressed. Based on ECC, we calculated the full crop water requirement Kc for the peach and apple orchards to be 0.42 and 0.37, respectively. In summary, for the apple orchard, our 0.5I treatment was close to predicted full crop water requirement (ETapple). But for the peach orchard, the ETpeach was greater, albeit slightly, than our 0.5I regime. Taken overall, these results demonstrate that better matching of water application to the evaporative surface of the orchard canopies (i.e. ECC) can substantially reduce irrigation water use in Goulburn Valley orchards. It is also apparent that ECC in these orchards where row spacing is typically 4–5 m can be relatively low.
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Lesslie, Robert G., Brendan G. Mackey, and Kathryn M. Preece. "A Computer-based Method of Wilderness Evaluation." Environmental Conservation 15, no. 3 (1988): 225–32. http://dx.doi.org/10.1017/s0376892900029362.
Повний текст джерелаАнотація:
With ever-increasing demands being made on remote and natural lands, planners and managers require more detailed information than hitherto to assist them in monitoring the status of this wilderness resource and developing appropriate and effective management prescriptions. These requirements are addressed by a computer-based wilderness evaluation procedure that has been developed for a national wilderness survey of Australia.The methodology, based on the wilderness continuum concept (Lesslie & Taylor, 1985), places emphasis on measuring variation in wilderness quality by using four indicators that represent the two essential attributes of remoteness and naturalness. This permits a precise assessment to be made of the wilderness resource, revealing those factors which contribute to or compromise wilderness quality. The computer-based storage and analysis of data enables surveys to be conducted over large, even continental, areas, yet at a relatively fine level of resolution that is appropriate to localized planning needs.Trial application to the State of Victoria, Australia, demonstrates that the survey procedure can be successfully adapted to a wide range of environments, use-patterns, data-base characteristics, and management objectives, which should be applicable and very widely useful elsewhere.
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Casiano Flores, Cesar, Joep Crompvoets, Maria Eugenia Ibarraran Viniegra, and Megan Farrelly. "Governance Assessment of the Flood’s Infrastructure Policy in San Pedro Cholula, Mexico: Potential for a Leapfrog to Water Sensitive." Sustainability 11, no. 24 (December 13, 2019): 7144. http://dx.doi.org/10.3390/su11247144.
Повний текст джерелаАнотація:
Climate change together with population growth and land-use change have increased the risk of urban floods. Urban floods cause severe damages to cities and their inhabitants, and they are expected to increase over time. Consequently, urban adaptation is required to shift from traditional infrastructure (grey) to multifunctional infrastructure (blue-green) for improved flood management. Until recently, studies on the role and adoption of blue-green infrastructure have centered around large cities in developed countries, including Melbourne and Rotterdam, among others. Meanwhile, middle-sized cities in developing countries have received less attention. According to the Urban Water Management Transition Framework (UWMTF), cities in developing countries can learn from the experiences of developed cities and leapfrog to more ‘water sensitive’ practices. Although leapfrogging is context-dependent, our understanding of factors that support leapfrogging remains embryonic. This paper contributes to the scholarly understanding of the governance factors that support and limit leapfrogging. By applying the Governance Assessment Tool through semi-structured interviews and reviewing secondary data, this research assessed the implementation of flood protection infrastructure in San Pedro Cholula, a middle size city of Mexico. This work found the most supportive quality for delivering multifunctional infrastructure, was the extent of the governance system. The governance support extent was rated as moderate-low considering the platform for change is limited to government actors, which has further reinforced traditional approaches to infrastructure. In addition, the necessary governance features of coherence, flexibility and intensity were assessed as constraining change, with flexibility being the least supportive governance factor and ultimately hindering social actors’ participation and innovation. While the contemporary governance arrangements of San Pedro Cholula are not yet conducive to promoting a leapfrog in the delivery of urban flood infrastructure, the analysis has pointed to three catalytic factors to underpin a leapfrogging situation: trans-disciplinary science; cross-sector partnerships; and, innovation experiments.
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Chapman, D. F., M. R. McCaskill, P. E. Quigley, A. N. Thompson, J. F. Graham, D.Borg, J. Lamb, G. Kearney, G. R. Saul, and S. G. Clark. "Effects of grazing method and fertiliser inputs on the productivity andsustainability of phalaris-based pastures in Western Victoria." Australian Journal of Experimental Agriculture 43, no. 8 (2003): 785. http://dx.doi.org/10.1071/ea02198.
Повний текст джерелаАнотація:
The effects of combinations of different fertiliser rates and grazing methods applied to phalaris-based pastures on an acid, saline, yellow sodosol on the Dundas Tablelands of western Victoria (mean annual rainfall 623�mm) were measured from 1997 to 2000. The objective was to help identify management systems that improve phalaris growth and persistence, water use, and animal production, and thereby the productivity and sustainability of grazing systems. Pastures were either set stocked with low [mean 6.4 kg phosphorus (P)/ha.year] or high (mean 25 kg P/ha.year) fertiliser rates, or rotationally grazed with high fertiliser (mean 25 kg P/ha.year). Rotational grazing was implemented as either a simple '4-paddock' system (fixed rotation length), or a more intensive system where rotation length varied with pasture growth rate. Unreplicated paddocks of volunteer pasture (dominated by onion grass and annual grass weeds) receiving an average of 8 kg P/ha.year were also monitored. All treatments were stocked with spring-lambing Merino ewes. Stocking rate was an emergent property of each treatment, and was driven by pasture quality and availability. Total pasture herbage accumulation ranged from 7150 to 9750 kg DM/ha.year and was significantly lower on the set-stocked, low-fertility treatment than on all other treatments. A significant treatment.day effect in the spline analysis of herbage mass was explained by a trend toward higher pasture mass in the rotationally grazed treatments than set-stocked treatments from the break of season until mid-spring. Rotational grazing led to significantly higher phalaris herbage accumulation than set stocking (mean 3680 v. 2120 kg DM/ha.year), but significantly lower subterranean clover herbage accumulation (1440 v. 2490 kg DM/ha.year). Despite the stronger growth of deep-rooted phalaris in the rotationally grazed treatments, maximum soil water deficits at the end of summer differed only slightly between treatments, with the difference between driest and wettest treatments amounting to only 14 mm. Summer growth of phalaris was apparently insufficient to generate significant differences in soil water extraction at depth, even when phalaris content was increased by rotational grazing, and re-wetting of the soil profile occurred at a similar rate for all treatments. Rotationally grazed treatments supported higher stocking rates than set-stocked treatments at high fertiliser rates (mean 14.9 v. 13.7 ewes/ha), but apparent losses in pasture feeding value due to lower legume content under rotational grazing meant that there were few significant differences between treatments in lamb production per hectare. The experiment showed that grazing method can have a substantial and rapid effect on pasture botanical composition. There are clear opportunities for producers to use temporal and spatial combinations of set stocking and rotational grazing to manipulate herbage mass and pasture composition within broad target ranges for achieving both animal production (e.g. high per-head animal performance) and sustainability (e.g. persistence of perennial grasses) objectives. Rigid application of either set stocking or rotational grazing imposes limitations on both pasture and animal production, and neither grazing method will optimise system performance under all conditions. The experiment also demonstrated that management and land-use changes that have much greater potential to increase water use than those examined here will be needed to ensure the sustainability of pasture systems in the high rainfall zone of western Victoria.
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Lin, Sherry. "Reviewer Acknowledgements for Higher Education Studies, Vol. 8, No. 4." Higher Education Studies 8, no. 4 (November 30, 2018): 200. http://dx.doi.org/10.5539/hes.v8n4p200.
Повний текст джерелаАнотація:
Higher Education Studies wishes to acknowledge the following individuals for their assistance with peer review of manuscripts for this issue. Their help and contributions in maintaining the quality of the journal are greatly appreciated.
Higher Education Studies is recruiting reviewers for the journal. If you are interested in becoming a reviewer, we welcome you to join us. Please find the application form and details at http://recruitment.ccsenet.org and e-mail the completed application form to hes@ccsenet.org.
Reviewers for Volume 8, Number 4
Abdelaziz Mohammed, Albaha University, Saudi Arabia
Anna Liduma, University of Latvia, Latvia
Arbabisarjou Azizollah, Zahedan University of Medical Sciences, Iran
Bahar Gün, İzmir University of Economics, Turkey
Barba Patton, University of Houston-Victoria, USA
Edward Lehner, Bronx Community College, City University of New York, USA
Evrim Ustunluoglu, Izmir University of Economics, Turkey
Gerard Hoyne, University of Notre Dame Australia, Australia
Gregory S. Ching, Fu Jen Catholic University, Taiwan
John Cowan, Edinburgh Napier University, United Kingdom
John Rafferty, Charles Sturt University, Australia
Kartheek R. Balapala, University Tunku Abdul Rahman, Malaysia
Laid Fekih, University of Tlemcen Algeria, Algeria
Mehmet Ersoy, Eskisehir Osmangazi University, Turkey
Meric Ozgeldi, Mersin University, Turkey
Michael John Maxel Okoche, Uganda Management Institute, Uganda
Mirosław Kowalski, University of Zielona Góra, Poland
Najia Sabir, Indiana University Bloomington, USA
Nancy Maynes, Nipissing University, Schulich School of Education, Canada, Canada
Philip Denton, Liverpool John Moores University, United Kingdom
Qing Xie, Jiangnan University, China
Sahar Ahadi, Islamic Azad University of Mashhad, Iran
Savitri Bevinakoppa, Melbourne Institute of Technology, Australia
Suat Capuk, Adiyaman University, Turkey
Teguh Budiharso, Center of Language and Culture Studies, Indonesia
Tuija A. Turunen, University of Lapland, Finland
Zahra Shahsavar, Shiraz University of Medical Sciences, Iran