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Статті в журналах з теми "Water-supply Use studies"
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Gill, B. P., P. H. Brooks, and J. L. Carpenter. "Water use by lactating sows." Proceedings of the British Society of Animal Production (1972) 1988 (March 1988): 122. http://dx.doi.org/10.1017/s0308229600017591.
Повний текст джерелаАнотація:
There have been few published studies on the water needs of lactating sows under contemporary systems of feeding, housing and management. The literature available indicates that lactating sows provided with an unrestricted water supply show considerable individual variations in daily water consumption. Although ARC (1981) suggest that lactating sows should have access to an unrestricted water supply, an allowance of between 15 and 20 l/day has been recommended to meet the requirements for water. This study investigated the water demands of lactating sows provided with an unrestricted supply of water and to determine the stage of lactation on daily water use.
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Zhang, Shanghong, Jiasheng Yang, Zan Xu, and Cheng Zhang. "Effect of Frequency of Multi-Source Water Supply on Regional Guarantee Rate of Water Use." Water 11, no. 7 (June 29, 2019): 1356. http://dx.doi.org/10.3390/w11071356.
Повний текст джерелаАнотація:
Multi-source, combined water supply models play an increasingly important role in solving regional water supply problems. At present, in the area of regional water supply, models are mainly used to study the problem of overall water guarantee rate, and do not take into account the impact of the uncertainty of multi-source water supplies on water supply risk. There is also a lack of research on how changes in multi-source water supplies affect sub-region and sub-user water guarantee rates. To address this knowledge gap, the encounter probability of different frequencies and a refined water resources allocation model of multi-source supplies were used. Using Tianjin as an example, this paper studies the quantitative relationship between the uncertainty of multi-source water inflows and the regional guarantee rate of water use. The objectives of the study are to analyze the changing trend of the water shortage rate and the main body of water supply in each region, and to quantitatively describe the influence of the variation of multi-source water supply on the main body of water supply for users. The results show that under the same requirement of guarantee rate for water use, as the number of water diversion sources increase, the probability of water supply meeting the water use rate increases significantly, and the risk to water supplies decreases. At the same time, suburban areas have a low dependence on external water supplies, while the change in the quantity of external water sources has a great impact on the water supply of the Zhongxinchengqu and Binhaixiqnu areas. The distribution and main body of water supply will change for different water users. Therefore, it is important to ensure a stable supply of external water for maintaining the guarantee rate of regional water use.
3
Lateş, Iustina, Mihail Luca, Gelu Ilie, and Nicoleta Iurist. "Studies on the Implementation of GIS Model in Water Supply Systems." Present Environment and Sustainable Development 10, no. 2 (October 1, 2016): 153–60. http://dx.doi.org/10.1515/pesd-2016-0033.
Повний текст джерелаАнотація:
Abstract The paper presents research conducted on the optimization of urban water supply networks. One direction of optimization follows the use of GIS models for digitization on components system. The use of water supply system operation depends on the proper functioning of the structural and functional components. In the analysis it was found that the main components of the system are the following: capture, headrace, puming stations, reservoirs, distribution networks. Each component is made up of a multitude of sub-components with specific structural and functional character. Using GIS program it follows to specify custom properties using layers of structural and functional domains. Autocad Civil 3D, GisNet Set, ArcGis Server and Autocad Toolbase programs allowed to obtain thematic maps on specific areas of the system. The model of the study can vary from simple to complex and can be generalized to any water supply system for a specific use (urban area, villages, tourist resorts, shopping complexes etc.).
4
Peleshok, M., and M. Petrovska. "Volyn region water supply: the state, problems and ways oftheir solution." Visnyk of the Lviv University. Series Geography, no. 45 (May 20, 2014): 217–26. http://dx.doi.org/10.30970/vgg.2014.45.1168.
Повний текст джерелаАнотація:
The water intake from the natural sources has been analyzed, as well as the structure of its use, the level of encompassing of settlements with the centralized water supply, the volumes of average daily water supplies, the lengths and the technical states of the centralized water supply networks, the volumes and causes of water losses, the results of sanitary chemical laboratory studies of water samples. The measures have been proposed for the improvement of water supplies on the Volyn’ region area. Key words: water supply, water resources, water use, centralized water supply.
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Macharia, Pauline, Norbert Kreuzinger, and Nzula Kitaka. "Applying the Water-Energy Nexus for Water Supply—A Diagnostic Review on Energy Use for Water Provision in Africa." Water 12, no. 9 (September 13, 2020): 2560. http://dx.doi.org/10.3390/w12092560.
Повний текст джерелаАнотація:
This work explores the application of the Water-Energy Nexus concept for water supply in the African context, where its operationalization is quite limited compared to developed regions. Furthermore, water supply and demand drivers and their influence on energy use are examined. This study found that there is limited literature available on the operationalization of the concept, and energy use is not considered a key performance indicator by water regulators and utilities. Regionally, most of the studies were carried out in the northern and southern Africa, where energy demand for water supply through desalination is high. An analysis of water supply and demand drivers show diminishing quantities of available freshwater, and increased anthropogenic pollutant loads in some areas are projected. Consequently, utilities will likely consider alternative energy-intensive water supply options. Increased population growth with the highest global urban growth rate is projected, with about 60% of the total population in Africa as urban dwellers by 2050. This implies huge growth in water demand that calls for investment in technology, infrastructure, and improved understanding of energy use and optimization, as the largest controllable input within utilities boundaries. However, it requires a data-driven understanding of the operational drivers for water supply and incorporation of energy assessment metrics to inform water-energy policies and to exploit the nexus opportunities.
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Byrne, J. J., M. Anda, and G. E. Ho. "Water sustainable house: water auditing of 3 case studies in Perth, Western Australia." Water Practice and Technology 14, no. 2 (April 16, 2019): 435–43. http://dx.doi.org/10.2166/wpt.2019.028.
Повний текст джерелаАнотація:
Abstract Householders in cities face water-related issues due to the increasing cost and restrictions in water use, especially during drought. They respond in many different ways, ranging from installing water efficient appliances, adopting water-saving behavior and implementing greywater reuse, to being water self reliant (off-mains supply). The latter approach should consider using only rainwater falling on the property boundaries, and if self-supply is from groundwater it should be derived from rainwater falling on the property. Therefore, sustainability depends on the annual rainfall, size of property and availability of storage for water to be used during periods without rainfall. In principle any house can be retrofitted to rely solely on rainwater, because technologies exist to treat subsequent wastewater to any quality desired for reuse. However, the energy requirement and investment needed may negate overall sustainability. Very few studies have assessed water use in households to determine whether relying solely on rainwater is practical or sustainable in the long-term. Three case studies in Perth, Western Australia are reported here, where water auditing has been used for sustainability assessment.
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Shamsutdinov, Ruslan, Irina Trotsenko, Yulia Korchevskaya, and Eduard Nazarkin. "On the use of a beam infiltration water intake structure for water supply purposes." E3S Web of Conferences 273 (2021): 04013. http://dx.doi.org/10.1051/e3sconf/202127304013.
Повний текст джерелаАнотація:
The object of research in this work is the under-channel waters of the Irtysh River, considered as an alternative source of water supply, necessary for the sustainable provision of high-quality drinking water to the population of cities in emergency situations. In bacteriological and sanitary-hygienic terms, studies have shown that infiltration waters are quite safe. According to the results of the analyzes carried out, infiltration waters are mainly fresh with a salinity of 0.5 to 1 g / l. The most rational scheme from a technical and economic point of view in relation to local conditions are beam water intake structures, which is due to the relatively low thickness of water-bearing rocks. At the same time, infiltration-type water intake structures in the Irtysh river valley should be located at a distance of up to 130 m from the river channel (taking into account the value of hydraulic resistance ∆lн). The distance between wells in a linear row should be taken up to 50 m.
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Loureiro, D., P. Vieira, C. Makropoulos, P. Kossieris, R. Ribeiro, J. Barateiro, and E. Katsiri. "Smart metering use cases to increase water and energy efficiency in water supply systems." Water Supply 14, no. 5 (May 17, 2014): 898–908. http://dx.doi.org/10.2166/ws.2014.049.
Повний текст джерелаАнотація:
Efficient water and energy use in water distribution systems is being limited by the lack of sufficient data about water and related energy consumption. Therefore, it is crucial to provide updated and continuous feedback information to water users. This paper describes relevant use cases to improve efficient water use and related energy consumption by water utilities and consumers through the use of smart metering technologies. A systematic approach was established to obtain a comprehensive list of possible functionalities, using the concept of use case. For the consumer domain, six high-level and 18 detailed-level use cases were obtained. For the water utility domain, seven high-level and 20 detailed-level use cases were described. The high-level use cases with higher priority to be implemented in the iWIDGET system were also identified based on the contribution of different target audiences. The list of use cases covers a comprehensive range of possible usages that can be built upon the exploitation of data related to water and energy use in water distribution systems and in households, which may be of further use as a guide for similar studies.
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Masmoudi, Rachid, Ahmed Kettab, and Bernard Brémond. "ANALYSIS OF DRINKING WATER CONSUMPTION AND LOSS. THE CASE OF WATER SUPPLY NETWORKS WITH LOW LEVEL COUNTING (BISKRA - ALGERIA)." Journal of Urban and Environmental Engineering 10, no. 2 (April 28, 2017): 162–68. http://dx.doi.org/10.4090/juee.2016.v10n2.162-168.
Повний текст джерелаАнотація:
Demand for drinking domestic water is continuously increasing specially in urban centres which experience high demographic expansion. The decrease of water losses in water supply networks can help preserve such a rare resource. Low number of water meters and intermittent supply make it difficult to quantify the leaking volumes of water. This article presents an analysis of the consumption for drinking water based on an extrapolation from a sample of consumers on whom data are available. Comparison of the volumes of water produced allows a determination of the losses in the water supply system. This analysis is completed by measurements of night flows. The results obtained may be relied on for an evaluation of the needs for drinking water in the South of Algeria, and for future regional development. The study indicates a high rate of water losses in the distribution network, reaching about 40%, and over-consumption due to an insufficient number of water meters and discontinuous supply. It is recommended that water meters come into general use and defective parts of the network are rehabilitated. We will try then to make the necessary recommendations in order to better functioning of the water supply systems in Algeria.
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Masmoudi, Rachid, Ahmed Kettab, and Bernard Brémond. "ANALYSIS OF DRINKING WATER CONSUMPTION AND LOSS. THE CASE OF WATER SUPPLY NETWORKS WITH LOW LEVEL COUNTING (BISKRA - ALGERIA)." Journal of Urban and Environmental Engineering 10, no. 2 (April 28, 2017): 162–68. http://dx.doi.org/10.4090/juee.2016.v10n2.162168.
Повний текст джерелаАнотація:
Demand for drinking domestic water is continuously increasing specially in urban centres which experience high demographic expansion. The decrease of water losses in water supply networks can help preserve such a rare resource. Low number of water meters and intermittent supply make it difficult to quantify the leaking volumes of water. This article presents an analysis of the consumption for drinking water based on an extrapolation from a sample of consumers on whom data are available. Comparison of the volumes of water produced allows a determination of the losses in the water supply system. This analysis is completed by measurements of night flows. The results obtained may be relied on for an evaluation of the needs for drinking water in the South of Algeria, and for future regional development. The study indicates a high rate of water losses in the distribution network, reaching about 40%, and over-consumption due to an insufficient number of water meters and discontinuous supply. It is recommended that water meters come into general use and defective parts of the network are rehabilitated. We will try then to make the necessary recommendations in order to better functioning of the water supply systems in Algeria.
Дисертації з теми "Water-supply Use studies"
1
Addison, Vicki. "Water allocation and the sustainability of dairying in the upper Waitaki river basin : a thesis submitted to the Victoria University of Wellington in partial fulfilment of the requirements for the degree of Master of Environmental Studies /." ResearchArchive@Victoria e-Thesis, 2009. http://hdl.handle.net/10063/1021.
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Rodriguez-Winter, Thelma. "The Energy, Greenhouse Gas Emissions, and Cost Implications of Municipal Water Supply & Wastewater Treatment." University of Toledo / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1395839509.
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Dingfelder, Jacqueline. "Wicked Water Problems: Can Network Governance Deliver? Integrated Water Management Case Studies from New Zealand and Oregon, USA." PDXScholar, 2017. https://pdxscholar.library.pdx.edu/open_access_etds/3623.
Повний текст джерелаАнотація:
Integrated water management is a wicked public policy problem with no clear path to resolution. This dissertation is an in-depth qualitative comparative analysis of two collaborative governance processes created to tackle complex water problems in New Zealand and Oregon, U.S.A. Both cases convened a wide range of state and non-state actors in efforts to find common ground, build consensus for change, and develop innovative water policy solutions.
The goal of this comparative case study analysis is to gain a better understanding of collaborative network governance frameworks as applied to integrated water management and primary factors for success. The proposition posits that collaborative networks involving public, private, and non-profit actors are better equipped than government-driven efforts to develop desired outcomes. To test this proposition, the research questions probe the role of state and non-state policy actors, conditions for collaboration, strength of actor ties, development of trust and social capital, barriers to success, and the role of climate change as a policy driver in these two case studies.
The comparative case study analysis yields fascinating insights that adds to the network governance literature. In the New Zealand case, a collaborative-led process called the Land and Water Forum (LAWF) showed that this ongoing network offers benefits to creating consensus on complex water issues. LAWF succeeded in moving policy conversations forward where previous government-led efforts had failed. Within the LAWF collaborative network, non-state actors formed strong ties; however, relationships with state actors exhibited weaker ties.
With Oregon's integrated water policy, a collaborative network approach created a more conducive environment for meaningful dialogue among vested interests, and built some levels of interdependency and trust, thus generating a wider array of policy options than through previous legislative and bureaucratic efforts. However, long-standing political, legal, and institutional challenges continue to constrain effective integrated water management and the delivery of integrated outcomes in Oregon. The Oregon case did not exhibit strong leadership within the collaborative to broker challenging policy issues. Also, it faced implementation challenges as one state agency was given responsibility for stewarding integrated water management but lacked authority for implementation or coordination with other state agencies. Overcoming fragmented natural resource governance arrangements remains a daunting challenge.
This research revealed three key findings: (1) in both cases, collaborative network governance worked well for framing and designing new integrated water policies, but encountered implementation challenges; (2) managing the complexities around the intersection of top-down, vertical command and control governance with horizontal collaborative approaches remains an ongoing challenge to New Public Governance; and (3) the two cases represent examples of the use of formal and informal processes for policy development. The benefits of collaborative governance for policy development are substantial, and the limitations appear to be obstacles to overcome and not fatal flaws. The main challenge lies in transitioning from policy and planning to implementing changes on the ground affecting the way we manage water today and in the future.
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Abdulaziz, Adbulaziz Mohamed. "Applications of remote sensing, GIS, and groundwater flow modeling in evaluating groundwater resources two case studies; east Nile Delta, Egypt and Gold Valley, California, USA /." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2007. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.
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Steurer, Erin. "A Private Commodity or Public Good? A Comparative Case Study of Water and Sanitation Privatization in Buenos Aires, Argentina, 1993-2006." [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002376.
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Mohamed, Shehaamah. "Competing water user sectors under a transformed South African water law: the role of local government, with a case study on the City of Cape Town Municipality." Thesis, University of the Western Cape, 2003. http://etd.uwc.ac.za/index.php?module=etd&.
Повний текст джерелаАнотація:
This thesis attempted to examine the enabling conditions of existing South African water law and its implementation by the appropriate authorities. The Cape Town Municipality's management over water supply and services is included in this study. The research attempted to expose any shortcomings that might be prevalent in the new water law. The water allocation mechanism of the transformed water legislation and the water demands within various competing water user sectors of the community, such as those pertaining to agriculture and industry, was also explored.
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Pinto, Augusto M. "Traditional Knowledge and Water Quality in Timor-Leste: Climate Change Adaptation Strategies Used by Local Communities in Laco-Mesac and Ulmera Villages." Ohio University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1416577109.
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Mthimunye, Keitumetse. "A comparative evaluation of water supply perceptions and overall stewardship in Hammaskraal amd Attridgeville." Diss., 2020. http://hdl.handle.net/10500/27370.
Повний текст джерелаАнотація:
This research focused on evaluating and comparing the perceptions, water-use
behaviour, water conservation awareness and overall water stewardship of participants
residing in Hammanskraal and Atteridgeville who have experienced intermittent water
supply in their domestic households – due to either water contamination incidents caused
by dilapidated infrastructure or water restrictions implemented by the City of Tshwane
Metropolitan Municipality during the 2016–2017 drought in the Gauteng Province. The
research concluded that the municipality needs to implement proactive water
conservation awareness initiatives on an ongoing basis to reduce high water demands
and to create a culture of water stewardship, especially in Atteridgeville. Transparent
communication is also required from the municipality to instil the necessary trust among
the public. It is recommended that the municipality attends to water leaks and ongoing
complaints from the public timeously to reduce the current apathy from the public against
reporting water-related issues and to ultimately ensure compliance to water restrictions.Geography
M.Sc. (Geography)
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Xaba, Thokozile P. "An estimation of the value of water in the commercial forestry : two case studies from KwaZulu-Natal, South Africa." Thesis, 2002. http://hdl.handle.net/10413/4841.
Повний текст джерелаАнотація:
The aim of this dissertation is to estimate the value of water in the commercial forestry in selected areas of Kwazulu-Natal. Furthermore, the essay focuses on two species:Eucalyptus grandis and Pinus patula. The estimation of the value of water is done using two types of water and they are evapo-transpiration (ET) and stream flow reduction (SFR). ET water is used because it has been discovered that there is a loss of water due to afforestation. On the other hand, SFR water is used because the existence of trees means that the water that is supposed to flow to the streams does not, as it is absorbed by the trees. Moreover, the essay develops two methods that can be used to estimate these two types of water in the commercial forestry. The methods are the residual method and the marginal value product (MVP) method. In the case of the residual method, the results are diverse. This means that the values of water for eucalyptus using the ET water, ranges from 05 cents to 23 cents. With the pinus patula, the values of water ranges from 01 cents to 03 cents. This is clear that the value of water for eucalyptus grandis using the ET water is higher than the pinus patula. The value of water using the MVP method using the ET water is decreasing. This means that the values of water starts from higher values to the lowest. This is due to the fact that we are estimating the marginal product. The values start from 72 cents and go down to 28 cents in the case of eucalyptus grandis. The values for the pinus patula start from 26 cents and go down to 12 cents. When estimating the value of water using SFR water, we do not use the residual method. We use the MVP method instead. The values obtained show that eucalyptus grandis values are higher than those of the pinus patula. They start from R5.1 0 cents and go down to R2.77 cents for eucalyptus grandis and from R2.39 to R1.03 for pinus patula. The methods used show that the economies of scale are present, because when we add more water, the value falls. Furthermore, The law of diminishing marginal retums is present because when we add more water; the values reach a maximum point and then start to fall. These two factors comply with the economic theory.Thesis (M.Com.)-University of Natal, Durban, 2002.
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Tekwa, Newman. "Gender, land reform and welfare outcomes : a case study of Chiredzi District, Zimbabwe." Thesis, 2020. http://hdl.handle.net/10500/27126.
Повний текст джерелаАнотація:
This thesis explores questions of gender equality in social welfare theory; methodologies;
approaches and policymaking in the Global South in the context of land reforms. This stems
from the realisation that gender equality issues in social welfare are increasingly receiving
greater attention in the context of the Global North and less in the South. By adopting a
Transformative Social Policy framework, the research departs from hegemonic livelihoods,
poverty reduction and the ‘classical models’ of land reforms often designed from the mould
of the neoliberal discourse of individual tenure to focus on land reform as a relational
question. Empirical data was gathered using a sequential explanatory mixed-methods
approach involving survey questionnaires; in-depths interviews; focus group discussions; key
informant interviews and field observations. A total of 105 randomly selected households,
comprising 56 male-headed households (MHHs) and 49 female-headed households (FHHs)
participated in the quantitative component of the study, comprising a control group of nonland
reform beneficiaries. Additionally, 30 purposively selected in-depths interviews
comprising 20 FHHs and 10 MHHs were conducted in resettlement study sites. Findings
from this this study indicates that despite the country’s depressed economic environment and
the effects of climate change, transfer of land enhanced the productive capacities of
individuals and rural households, including those headed by females. At micro-level, in-kind
transfer of land to rural households proved to be a more superior social protection measure
compared to either food or cash transfer. However, social relations and institutions proved
resistant to change, posing a greater obstacle to social transformation. And more importantly,
from a social reproductive perspective, the same land reform that enhanced the productive
capacities of women, inadvertently, increased their social reproductive work with
implications on the welfare of women relative to men. The thesis makes a contribution to
social policy debates in Africa, which hitherto have been dominated by the introduction of
cash transfers as witnessed in many countries across the continent. The transformative social
policy approach brings novelty to the study of land reforms. By Conceptualising gender as a
relational and social construct, the study adds knowledge on the nexus between gender, land
reform and welfare using the Fast Track Land Reform Programme (FTLRP) as reference.
With the FTLRP––as a leftist policy in a liberalised economy––there is a need for the government to re-align its social and economic policies to avoid inconsistencies in the
country’s development path. On the gender front there is need to legislate resettlement areas
as outside the jurisdiction of traditional structures; promulgate statutory instruments dealing
with land and setting up designated land claims courts linked right up to the Constitutional
Court. Specifically, for Chiredzi, there is a need to establish a corporate body to administer
the affairs of Mkwasine following the pulling out of the Estate.
Keywords: gender, land reforms, water reforms, transformativeSociology
Ph. D. (Sociology)
Книги з теми "Water-supply Use studies"
1
Stephenson, Rebecca A. Water, land, and people: Selected studies in fresh water resources. [Mangilao]: Water and Energy Research Institute and Micronesian Area Research Center, University of Guam, 1987.
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Environment, Alberta Alberta. South Saskatchewan River Basin water management plan phase two: Background studies. [Edmonton]: Alberta Environment, 2003.
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3
Sestrap, Asta. City of Lynden land supply analysis &: Abbottsford-Sumas aquifer water quality project. Bellingham, WA: Huxley College of the Environment, Western Washington University, 2005.
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4
Ingo, Heinz, Koo-Oshima Sasha, and Food and Agriculture Organization of the United Nations, eds. The wealth of waste: The economics of wastewater use in agriculture. Rome: Food and Agriculture Organization of the United Nations, 2010.
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5
Fullerton, Ticky. Watershed: Deciding our water future. Sydney: ABC Books for the Australian Broadcasting Corporation, 2001.
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6
Mills Legal Clinic of Stanford Law School and Stanford University. School of Law, eds. Not coming up dry: Regulating the use of Namibia's scarce water resources by mining operations. Windhoek, Namibia: Legal Assistance Centre, 2009.
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Antônio Heriberto de Castro Teixeira. Measurements and modelling of evapotranspiration to assess agricultural water productivity in basins with changing land use patterns: A case study in the São Francisco River basin, Brazil. Wageningen: Wageningen University, 2008.
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Acuña, Helga Geovannini. Rain harvesting in the rainforest: The ancient Maya agricultural landscape of Calakmul, Campeche, Mexico. Oxford: Archaeopress, 2008.
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Acuña, Helga Geovannini. Rain harvesting in the rainforest: The ancient Maya agricultural landscape of Calakmul, Campeche, Mexico. Oxford: Archaeopress, 2008.
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Kevin, Barten Paul, ed. Land use effects on streamflow and water quality in the northeastern United States. Boca Raton, Fla: CRC, 2007.
Знайти повний текст джерелаЧастини книг з теми "Water-supply Use studies"
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Ikemi, Mayu. "Dissociation Between National Policy and Local Communities in Regard to Water Supply Management." In Global Environmental Studies, 47–63. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-7711-3_4.
Повний текст джерелаАнотація:
AbstractVarious governments and international organizations have made efforts to expand water supply and sanitation services in rural Africa. This study aimed to evaluate and elucidate the outcomes of national policies on improving water supply management in rural Africa through a case study of Senegal. This case study examined the actual conditions of water supply facilities and residents’ water use in villages. I also attempted to identify the remaining challenges for sustainable water management by local communities. In summary, despite improvement in access to safe drinking water resources for rural populations in Senegal, the national policies were not completely successful. My findings highlight that improving water quality is as crucial as expanding water supply facilities in rural Africa. Meanwhile, for the sustainable self-management of water resources in rural Africa, the case study suggested the importance of local people’s transparent management, information sharing, and mutual aid. Rural residents in Africa have great potential to improve their current water environment through their own initiatives. This potential should be considered as a key to achieving the goal of sustainable water supply management in local communities.
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Reetsch, Anika, Didas Kimaro, Karl-Heinz Feger, and Kai Schwärzel. "Traditional and Adapted Composting Practices Applied in Smallholder Banana-Coffee-Based Farming Systems: Case Studies from Kagera and Morogoro Regions, Tanzania." In Organic Waste Composting through Nexus Thinking, 165–84. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-36283-6_8.
Повний текст джерелаАнотація:
AbstractIn Tanzania, about 90% of the banana-coffee-based farming systems lie in the hands of smallholder farmer families. In these systems, smallholder farmers traditionally add farm waste to crop fields, making soils rich in organic matter (humus) and plant-available nutrients. Correspondingly, soils remained fertile during cultivation for over a century. Since the 1960s, the increasing demand for food and biofuels of a growing population has resulted in an overuse of these farming systems, which has occurred in tandem with deforestation, omitted fallows, declined farm size, and soil erosion. Hence, humus and nutrient contents in soils have decreased and soils gradually degraded. Inadequate use of farm waste has led to a further reduction in soil fertility, as less organic material is added to the soils for nutrient supply than is removed during harvesting. Acknowledging that the traditional use of farm waste successfully built up soil fertility over a century and has been reduced in only a few decades, we argue that traditional composting practices can play a key role in rebuilding soil fertility, if such practices are adapted to face the modern challenges. In this chapter, we discuss two cases in Tanzania: one on the traditional use of compost in the Kagera region (Great African Rift Valley) and another about adapted practices to produce compost manure in the Morogoro region (Uluguru Mountains). Both cases refer to rainfed, smallholder banana-coffee-based farming systems. To conclude, optimised composting practices enable the replenishment of soil nutrients, increase the capacity of soils to store plant-available nutrients and water and thus, enhance soil fertility and food production in degraded banana-coffee-based farming systems. We further conclude that future research is needed on a) nutrient cycling in farms implementing different composting practices and on b) socio-economic analyses of farm households that do not successfully restore soil fertility through composting.
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Nzengya, Daniel M., and John K. Maguta. "Gendered Vulnerability to Climate Change Impacts in Selected Counties in Kenya." In African Handbook of Climate Change Adaptation, 1–18. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-42091-8_169-1.
Повний текст джерелаАнотація:
AbstractExtreme climate change events such as frequent and prolonged droughts or floods associated with climate change can be very disruptive to peoples’ livelihoods particularly in rural settings, where people rely on the immediate environment for livelihood. Shocks in the people’s livelihoods can trigger diverse responses that include migration as a coping or adaption strategy. Migration takes many forms depending on the context and resources availability. Very few studies in Kenya have used qualitative analysis to bring up women’s voices in relation to gender, climate change, and migration, especially along hydrological gradient. This chapter presents results of qualitative research conducted from 58 participants in 2018 in three counties in Kenya, namely, Kiambu County, Machakos, and Makueni. The study sought to examine gender perceptions related to climate-induced migration, that is: whether climate change is perceived to be affecting women’s livelihood differently from that of men; examine in what ways experiences of climate induced migration differed for men and women; explore perceptions on the county government efforts to cope with climate-induced migration; and examine perceptions of the role of nongovernmental agencies in helping citizens cope with climate change. From the results obtained on ways in which climate change affected women livelihoods more than men had four themes: (1) women exerted more strain in domestic chores, child/family care, and in the farm labor; (2) women also experienced more time demands. The sources of water and firewood were getting more scarce leading to women travel long distances in search to fetch water and firewood; (3) reduced farm yields, hence inadequate food supply; and (4) the effects of time and strain demands on women was a contributory factor to women poor health and domestic conflicts. Several measures that the county government could take to assist women to cope with climate change-induced migration had five themes which include the following: (1) developing climate change mitigations, and reducing deforestation; (2) increasing water harvesting and storage; (3) develop smart agriculture through the use of drought-resistant crops and drought mitigation education; (4) encourage diversification of livelihoods; and finally (5) providing humanitarian assistance to the most vulnerable populations such as orphans and the very poor. Thirdly, the measures mentioned that NGO’s could take to assist rural communities to cope with climate change-induced migration did not vary significantly from those mentioned for county government, except probably for a new theme of increasing advocacy for climate adaption policies.
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Nzengya, Daniel M., and John Kibe Maguta. "Gendered Vulnerability to Climate Change Impacts in Selected Counties in Kenya." In African Handbook of Climate Change Adaptation, 2045–62. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-45106-6_169.
Повний текст джерелаАнотація:
AbstractExtreme climate change events such as frequent and prolonged droughts or floods associated with climate change can be very disruptive to peoples’ livelihoods particularly in rural settings, where people rely on the immediate environment for livelihood. Shocks in the people’s livelihoods can trigger diverse responses that include migration as a coping or adaption strategy. Migration takes many forms depending on the context and resources availability. Very few studies in Kenya have used qualitative analysis to bring up women’s voices in relation to gender, climate change, and migration, especially along hydrological gradient. This chapter presents results of qualitative research conducted from 58 participants in 2018 in three counties in Kenya, namely, Kiambu County, Machakos, and Makueni. The study sought to examine gender perceptions related to climate-induced migration, that is: whether climate change is perceived to be affecting women’s livelihood differently from that of men; examine in what ways experiences of climate induced migration differed for men and women; explore perceptions on the county government efforts to cope with climate-induced migration; and examine perceptions of the role of nongovernmental agencies in helping citizens cope with climate change. From the results obtained on ways in which climate change affected women livelihoods more than men had four themes: (1) women exerted more strain in domestic chores, child/family care, and in the farm labor; (2) women also experienced more time demands. The sources of water and firewood were getting more scarce leading to women travel long distances in search to fetch water and firewood; (3) reduced farm yields, hence inadequate food supply; and (4) the effects of time and strain demands on women was a contributory factor to women poor health and domestic conflicts. Several measures that the county government could take to assist women to cope with climate change-induced migration had five themes which include the following: (1) developing climate change mitigations, and reducing deforestation; (2) increasing water harvesting and storage; (3) develop smart agriculture through the use of drought-resistant crops and drought mitigation education; (4) encourage diversification of livelihoods; and finally (5) providing humanitarian assistance to the most vulnerable populations such as orphans and the very poor. Thirdly, the measures mentioned that NGO’s could take to assist rural communities to cope with climate change-induced migration did not vary significantly from those mentioned for county government, except probably for a new theme of increasing advocacy for climate adaption policies.
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Tangi, Marco. "Dynamic Sediment Connectivity Modelling for Strategic River Basin Planning." In Special Topics in Information Technology, 27–37. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-15374-7_3.
Повний текст джерелаАнотація:
AbstractSediment connectivity is a distributed property of river systems that emerges from the connected transfer of sediment between multiple sources and sinks. Its disruption, brought by anthropic disturbances, can have severe and unforeseen consequences on both fluvial ecosystems and human livelihood. Modeling network-scale sediment connectivity provides a foundational understanding of river processes and their response to new pressures and can be used to forecast future system evolutions. In this chapter, we present the basin-scale, dynamic sediment connectivity model D-CASCADE (Dynamic CAtchment Sediment Connectivity And DElivery), which quantifies spatiotemporal patterns of sediment delivery in river networks. D-CASCADE considers multiple factors affecting transport, including heterogeneities in hydrology and sediment supply, different grain sizes, channel morphological evolution, and reservoir presence and management. The model is designed to be flexible, data parsimonious, and computationally efficient. We also present two applications of D-CASCADE in real-world case studies for historic geomorphic evolution reconstruction and future dam impacts forecasting. D-CASCADE is intended for integrated, basin-scale water management efforts, to perform multiple screening of various decision portfolios for hydromorphological impact assessments.
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Boroomandnia, Arezoo, Omid Bozorg-Haddad, Jimmy Yu, and Mariam Darestani. "Nanotechnology application in water resource management." In Water Resources: Future Perspectives, Challenges, Concepts and Necessities, 33–62. IWA Publishing, 2021. http://dx.doi.org/10.2166/9781789062144_0033.
Повний текст джерелаАнотація:
Abstract Fast-growing water demand, population growth, global climate change, and water quality deterioration all drive scientists to apply novel approaches to water resource management. Nanotechnology is one of the state-of-the-art tools in scientists’ hands which they can use to meet human water needs via reuse of water and utilizing unconventional water resources. Additionally, monitoring water supply systems using new nanomaterials provides more efficient water distribution networks. In this chapter, we consider the generic concepts of nanotechnology and its effects on water resources management strategies. A wide range of nanomaterials and nanotechnologies, including nano-adsorbents, nano-photocatalysts, and nano-membranes, are introduced to explain the role of nanotechnology in providing new water resources to meet growing demand. Also, nanomaterial application as a water alternative in industry, reducing water demand in the industrial sector, is presented. Another revolution made by nanomaterials, also discussed in this chapter, is their use in water supply systems for monitoring probable leakage and leakage reduction. Finally, we present case studies that clarify the influence of nanotechnology on water resources and their management strategies. These case studies prove the importance and inevitable application of nanotechnology to satisfy the rising water demand in the modern world, and show the necessity of nanotechnology awareness for today's water experts.
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Klingborg, Patrik. "Introduction. Wells, cisterns and the water supply in ancient Greece." In Going against the flow. Wells, cisterns and water in ancient Greece, 9–30. Editorial Committee of the Swedish Institutes at Athens, 2023. http://dx.doi.org/10.30549/actaath-8-23-01.
Повний текст джерелаАнотація:
Despite the prevalent picture of the water supply in the ancient world as being dominated by fountains and aqueducts, the large number of excavated cisterns and wells show that these were the primary water sources for most individuals. Yet, little research has been done on their construction, function and use. This prompted the organization of the workshop Going against the flow. Wells, cisterns and water in ancient Greece, held at the Swedish Institute at Athens on 28–29 September 2017, and subsequent publication of the contributions in this volume. This chapter begins by providing a background to why cisterns and wells should be studied, followed by the aims of the volume, i.e. to collect studies on Greek cisterns and wells that bring the empirical evidence into focus. Following this the chapter provides a background to the contributions by discussing the definitions of the terms “cistern” and “well”, previous research, and suggestions for future work. Finally, the chapter presents the individual contributions in the volume.
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Kumari, Sneha, Yogesh Patil, and Prakash Rao. "An Approach to Sustainable Watershed Management." In Reconsidering the Impact of Climate Change on Global Water Supply, Use, and Management, 252–71. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-1046-8.ch014.
Повний текст джерелаАнотація:
Western Maharashtra consists of drought prone villages, which around seventy years ago were facing drastic challenges regarding water requirements. People living in such areas started to migrate from these villages in need of food and water. The chapter focuses on few case studies of drought prone areas of Western Maharashtra which made a move towards sustainability and has created an excellent model of watershed projects. Several practices like ban on cutting trees, terrace farming, contour bunding, drip irrigation, sprinkle irrigation, introduction of cooking stoves, rotational grazing, efficient water distribution and change in cultivation of agricultural crops according to the climate were followed which led the village to become a model for Aadarsh Gaon (An Ideal Village). The author has used secondary data from previous research work and critically analyses the case studies on water management in drought prone areas of Western Maharashtra which managed to become a model for sustainable use of water.
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Singh, Ram Karan. "Impact of Climate Change on the Retreat of Himalayan Glaciers and Its Impact on Major River Hydrology." In Reconsidering the Impact of Climate Change on Global Water Supply, Use, and Management, 70–83. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-1046-8.ch005.
Повний текст джерелаАнотація:
Himalayan Glaciers are the largest freshwater resource on earth and the rivers originating from them are an important source of water. They significantly modify stream flow both in quantity and timing as annual basin run-off is enhanced or decreased in years of negative or positive glacier mass balance respectively. Although glacial advances and retreats are a part of its natural cyclic phenomenon, the rate of de-glaciations has accelerated in recent times due to climatic changes and global warming caused by anthropogenic activities. Some of the important glaciers of Himalayas are receding at an alarming rate, which could have dire consequences on river hydrology of the main rivers of this region namely, Indus, Ganga and Brahmaputra, initially causing floods and the paradoxically, scarcity of water later. This chapter is an attempt to summarize some of the studies on Himalayan glacier retreats and also to assess its impact on the availability of freshwater in the sub-continent.
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Hiremath, Rahul, Bimlesh Kumar, Sheelratan S. Bansode, Gurudas Nulkar, Sharmila S. Patil, and J. Murali. "Industrial Wastewater Management in the Context of Climate Change Adaptation in Selected Cities of India." In Reconsidering the Impact of Climate Change on Global Water Supply, Use, and Management, 294–313. IGI Global, 2017. http://dx.doi.org/10.4018/978-1-5225-1046-8.ch016.
Повний текст джерелаАнотація:
Climate change and wastewater control are one of the foremost demanding situations for Indian cities. Urbanization and unparalleled growth of cities across India continue to create immense pressure on land and water resources. This uncontrolled growth continues to produce growing volumes of wastewater. Climate change, impacts inclusive of, intense storm events in summer time or extended moist periods in wintry weather are quite visible in India. In urban and peri-urban areas, wastewater use for agriculture is an emerging precedence. Due to susceptible enforcement of regulatory, most of the wastewater generated is permitted off untreated/ partially treated. While many previous studies have checked out the global modifications and associated impacts of climatic variations on water resources, few have targeted at the evaluation of the particular effects and adaptation priorities for water systems in towns. Proper reuse of wastewater for irrigation will significantly lessen the shortage, offer a sustainable water source, improving farming productiveness, lessen pollution, generate livelihood potential for low earnings city households along with contributing to their each day food needs. There are tradeoffs which need to understand which includes problems to individual's health, and surroundings. Through suitable treatment methods, water users' cooperatives, policy shift and the introduction of market based approaches, treated wastewater use in agriculture can be enhanced and all associated risks can also be curtailed. This chapter focuses on use of treated urban wastewater and its management for agriculture in selected Indian cities.
Тези доповідей конференцій з теми "Water-supply Use studies"
1
Bacal, Petru, Veronica Railean, and Daniela Burduja. "Mecanismul de reglementare economică a utilizării apelor în bh RĂUT (în limitele RD Centru)." In Starea actuală a componentelor de mediu. Institute of Ecology and Geography, Republic of Moldova, 2019. http://dx.doi.org/10.53380/9789975315593.29.
Повний текст джерелаАнотація:
The scope of this study is application of economic regulation of water use in the Raut river basin (in the limits of Central Development Region from Republic of Moldova. The main objectives of studies are: 1) the analysis of the costs and tariffs of the water supply and sanitation services; 3) the cost recovery analysis of water of water use of the public water supply and sanitation systems; 3) evaluation of financial performance of water supply companies; 4) financing of water sector the area of study; 5) elaboration of recommendations for reforming of economic mechanism for sustainable use of water resources.
2
Bacal, Petru, and Veronica Railean. "Reglementarea economică a utilizării resurselor de apă în orașele Regiunii de Dezvoltare Centru." In Provocări şi tendinţe actuale în cercetarea componentelor naturale şi socio-economice ale ecosistemelor urbane şi rurale. Institute of Ecology and Geography, Republic of Moldova, 2020. http://dx.doi.org/10.53380/9789975891608.24.
Повний текст джерелаАнотація:
The scope of this study is application of economic regulation of water use in the urban area of Central Development Region from Republic of Moldova. The main objectives of studies are: 1) the analysis of the costs and tariffs of the water supply and sanitation services; 3) the cost recovery instruments of water use; 4) evaluation of financial performance of water supply companies; 5) elaboration of recommendations for reforming of economic mechanism for sustainable use of water resources.
3
Werth, David, and Matthew Havice. "A Review of Common Problems Observed in Cooling Water Intakes and the Use of Physical Models to Develop Effective Solutions." In ASME/JSME/KSME 2015 Joint Fluids Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ajkfluids2015-33776.
Повний текст джерелаАнотація:
Pump intake structures are a necessary component of the cooling water systems for power plants, process and manufacturing facilities, flood control and water/wastewater applications. Large cooling water systems often use substantial sea / river water intakes or cooling towers to provide the required cooling of the process or circulating water. These structures can be very large and often house multiple pump with capacities ranging in size from a few hundred m3/hr to 60,000 m3/hr or more. With such large flow rates care must be taken to ensure uniform flow to the pump to limit vortex activity, vibration, flow induced cavitation and performance problems. In many cases, a physical hydraulic model study is conducted to evaluate the overall approach flow and the performance of the intake. This paper presents a synopsis of several recent physical model studies and a review of recurring problems associated with common design features. This paper takes a closer look at stop log support walls, an intake design feature common to seawater intakes. This wall is often used to minimize the height of the stop logs. In applications with large variations of water level, such as a seawater intake, there are times when the support walls are submerged significantly, resulting in significant flow disturbances. A feature common to cooling towers is the use of 90-degree suction elbows to supply horizontal pumps. A review of short radius vs. long radius elbow performance is presented. Cooling towers often have another common feature which is a significant difference in depth between the cooling tower basin and the pump sump. This results in typical shallow basins and deeper sumps. A common problem is the utilization of minimum pump submergence to set the water levels without reference to the basin invert elevation. A discussion of choked flow conditions in cooling towers is presented. A final discussion is presented regarding cross-flow and the use of concentrated supply channels in cooling tower applications to facilitate the isolation of individual tower cells. This paper presents a synopsis of several recent physical model studies and a review of recurring problems associated with common intake design features. The results of several model studies are presented to demonstrate the negative impacts that these common intake features have on approach flow conditions. The intent of the paper is to provide the design engineer some additional guidance not offered in industry guidelines or standards with the hope of avoiding common problems which can be costly and difficult to remediate after the intake has been constructed.
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AL-Hasani, Ban, Mawada Abdellatif, Iacopo Carnacina, Clare Harris, and Salah Zubaidi. "CRITERIA FOR SELECTION OF SUITABLE SITES FOR RAINWATER HARVESTING IN THE MIDDLE EAST FOR AGRICULTURE USE: A REVIEW STUDY." In The SLIIT International Conference on Engineering and Technology 2022. Faculty of Engineering, SLIIT, 2022. http://dx.doi.org/10.54389/yayu2142.
Повний текст джерелаАнотація:
In arid and semi-arid regions, rainwater harvesting represents an important alternate source of water supply around the globe. The middle east is an integrally dry zone and due to climate change, it has experienced a severe drought for the last decade that made the situation worse. Many countries are suffering from awful water crises due to increasing water demand for agriculture and rapid urbanization. Therefore, unconventional water supply resources practices such as using rainwater harvesting for agricultural purposes can be possibly used to tackle water scarcity. Numerous researchers have established different criteria and methods to identify suitable sites selection techniques for rainwater harvesting (RWH). The main objective of this study was to determine the most commonly effective methods and techniques that have been practiced in the middle-east region to summarize the best methods for rainwater harvesting site selection. These effective common methods of multi-criteria analysis (MCA) were discussed accordingly in this review paper and based on the previous studies the best applicable method was the integration between (MCA) method and the GIS technique. The study employed a method of gathering and recording the main criteria and techniques which were established in the last thirty years. It compared and categorized the main methodologies from previous studies and practices from international organizations and scientific research and identified the most common characteristics and sets of criteria suitable for use in arid and semi-arid regions. The techniques were diverse based on biophysical criteria to methods including socio-economic criteria, precisely in the last two decades. The most effective and significant criteria for suitable site selection of RWH in the arid and semi-arid regions found are: land use/land cover, slope, type of soil, rainfall intensity, streams distant and the cost. The success of RWH selection sites tended to increase when these criteria are measured and based on these criteria. KEYWORDS: RWH Selection Suitability, Arid and semi-arid zones, Middle East, Agriculture, GIS, Multi-criteria analysis.
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Ito, Sadasuke, Naokatsu Miura, and Yasushi Takano. "Studies of Heat Pumps Using Direct Expansion Type Solar Collectors." In ASME 2003 International Solar Energy Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/isec2003-44212.
Повний текст джерелаАнотація:
A photovoltaic and thermal hybrid panel which was made of an aluminum roll -bond panel with a photovoltaic module on the surface was developed recently for use as an evaporator of a heat pump for residential hot water supply and room heating.1) Pressure loss of the refrigerant at the evaporator was large. Therefore, in the present study, shapes of the inlet and the outlet of the panel were modified to reduce pressure loss; also, thermal performance of the heat pump which adopted three evaporator panels connected in series was examined. Total area of the panels was about 1.9 m2 and the rated capacity of the compressor was 250 W. These modifications reduced pressure loss and improved thermal performance. The effect of the location of the feeler bulb on performance of the heat pump was also examined. It was inferred that the feeler bulb fixed on the tube at the outlet of the evaporator should be as close as possible to the evaporator outlet.
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Serpokrilov, N. S., S. Khalil Ahmed, and A. S. Smolyanichenko. "APPLICATION OF AGRICULTURAL WASTE FOR THE INTENSIFICATION OF THE WORK OF PURIFICATION TREATMENT OF WATER TURNING WATERS OF FISHING ENTERPRISES." In STATE AND DEVELOPMENT PROSPECTS OF AGRIBUSINESS. DSTU-PRINT, 2020. http://dx.doi.org/10.23947/interagro.2020.1.256-260.
Повний текст джерелаАнотація:
The article presents studies on the use of the initial rice straw without carbonization as a load of clarifying filters for the treatment of recycled water of closed water supply (CWS). The idea is based on the properties of rice straw, which is an affordable renewable natural resource, requiring fairly simple and low-cost operations to obtain the required size of the load, as well as easily disposed of as fertilizer after working out.
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Twomey, Kelly M., and Michael E. Webber. "Evaluating the Energy Intensity of the US Public Water System." In ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/es2011-54165.
Повний текст джерелаАнотація:
Previous analyses have concluded that the United State’s water sector uses over 3% of national electricity consumption for the production, conveyance, and treatment of water and wastewater and as much as 10% when considering the energy required for on-site heating, cooling, pumping, and softening of water for end-use. The energy intensity of water is influenced by factors such as source water quality, its proximity to a water treatment facility and end-use, its intended end-use and sanitation level, as well as its conveyance to and treatment at a wastewater treatment facility. Since these requirements differ by geographic location, climate, season, and local water quality standards, the energy consumption of regional water systems vary significantly. While national studies have aggregated averages for the energy use and energy intensity of various stages of the of the US water system, these estimates do not capture the wide disparity between regional water systems. For instance, 19 percent of California’s total electricity generation is used to withdraw, collect, convey, treat, distribute, and prepare water for end-use, nearly doubling the national average. Much of this electricity is used to move water over high elevations and across long distances from water-rich to water-stressed regions of the state. Potable water received by users in Southern California has typically been pumped as far as 450 miles, and lifted nearly 2000ft over the system’s highest point in the Tehachapi Mountains. Consequently, the energy intensity of San Diego County’s water is approximately 11,000 kWh per million gallons for pumping treatment and distribution, as compared to the US average which is estimated to be in the vicinity of 1,500–2,000 kWh per million gallons. With added pressures on the state’s long-haul transfer systems from population growth and growing interest in energy-intensive desalination, this margin will likely increase. This manuscript consists of a first-order analysis to quantify the energy embedded in the US public water supply, which is the primary water source to residential, commercial, and municipal users. Our analysis finds that energy use associated with the public water supply is 4.7% of the nation’s annual primary energy and 6.1% of national electricity consumption, respectively. Public water and wastewater pumping, treatment, and distribution, as well as commercial and residential water-heating were considered in this preliminary work. End-use energy requirements associated with water for municipal, industrial, and self-supplied sectors (i.e. agriculture, thermoelectric, mining, etc.) were not included in this analysis.
8
Nakamura, Yasuyuki, Yoshitugu Morishita, Shinichiro Maruyama, Shinichi Tezuka, Daisuke Ogane, and Yuji Takashima. "Assessment of the Applicability of the Abrasive Water Jet Technique for Dismantling the Reactor of Fugen: Studies for Reducing the Usage of Abrasive and for Surveying the Cutting Situation Under the Water." In 16th International Conference on Nuclear Engineering. ASMEDC, 2008. http://dx.doi.org/10.1115/icone16-48828.
Повний текст джерелаАнотація:
The reactor of FUGEN NPP consists of many number of double-tube arranging a pressure tube (P/T) and a calandria tube (C/T) coaxially. In the case of dismantling both a P/T and a C/T simultaneously, it is preferable to use the mechanical cutting method because it does not apply the heat to highly activated P/T and C/T, as a result, it would be suppressed to release activated particles into surrounding environment. The method is also required to use a smaller cutting device for permitting the remote control of it in a narrow space, and to have a relatively long standoff for cutting the double-tube simultaneously. The authors chose the abrasive water jet (AWJ) cutting method as one of the mechanical cutting method for dismantling the reactor. The authors have also developed the smaller AWJ cutting device and confirmed that the device is applicable to the cutting of the double-tube. On the other hand, it is an issue to reduce an amount of abrasive because it becomes the secondary radioactive waste after the cutting work. It is also difficult to survey the cutting condition by any visual methods like a TV camera in the water becoming cloudy by both used abrasive and cut metal grit. For solving these issues, the following two studies were conducted. (1) The recycle of used abrasive was examined. And it was also confirmed to be able to predict an optimal supply rate of abrasive by considering the conservation of momentum between the water jet and the abrasive. (2) It was possible to judge whether the material could be cut or not by detecting the change in the frequency characteristics of vibration or sound caused during the cutting process.
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Curtiss, Peter S., and Jan F. Kreider. "Evaluation of Cradle to Grave Impacts From Potential Automotive Fuel Replacements: An Update." In ASME 2009 3rd International Conference on Energy Sustainability collocated with the Heat Transfer and InterPACK09 Conferences. ASMEDC, 2009. http://dx.doi.org/10.1115/es2009-90326.
Повний текст джерелаАнотація:
In modern society, everything from transportation to commerce to food supply is heavily dependent on the availability of cheap and plentiful energy supplies. In the past few years many have realized that the traditional sources of energy — oil and gas — are in limited supply and that we need to prepare for the approaching production maxima. Recent research has focused on alternative forms of transportation energy including biofuels, unconventional refining techniques, and heavy oil and bitumen. This report is a continuation of earlier research and now considers ethanol produced from municipal solid waste, ethanol from algae, and compressed natural gas. The data presented are maintained in the same format as previous studies to facilitate comparison between the fuels. Results are reported for land use, water use, input-to-output energy ratio, and carbon emissions for each fuel cycle and source. Data are given for the cases of 10, 25, and 50 percent displacements of the 2012 predicted transportation energy needs (i.e., the equivalent of 430 million gallons of gasoline per day). Cradle-to-grave findings indicate that some novel fuels cannot substitute for conventional fuels without consuming more water or land and emitting more greenhouse gases than fuels in use today. The life cycle analysis approach presented here is that which should be used as the US moves toward low carbon fuel standards (LCFS) and carbon cap and trade (CC&T) approaches for reducing carbon loading of the environment.
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Basilio, Leandro P., Fabiano G. Drumond, Pedro L. F. Mendes, Alessandro França, Marcílio P. Prado, and Jonatas Ribeiro. "Flow Assurance With Water Heated Pipe-in-Pipe in Fields With High Gas Oil Ratio and High Wax Appearance Temperature." In ASME 2013 32nd International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/omae2013-10143.
Повний текст джерелаАнотація:
The development of pre-salt fields in the Santos Basin has presented a plenty of technological challenges, which include the production of fluids with high values of GOR (Gas Oil Ratio) and high values of WAT (Wax Appearance Temperature). To avoid the wax deposition, it is absolutely imperative handling the temperature by insulation and/or heating. If in one hand the production system thermal insulation minimizes the heat losses to the environment, on the other hand the cooling due the thermodynamic effect of gas expansion is inevitable, mainly in fields with high GOR values. To mitigate the problem of temperature drop, mainly in the risers where the expansion effects are pronounced, various heating systems for subsea pipelines have been studied by PETROBRAS. In parallel to these studies, it was noted that the design philosophy of the offshore production units for the pre-salt fields have indicated the use of turbo–generators to supply electrical power to the production unit, leading to the opportunity of using the generated super heated gases, originally discharged into the atmosphere, in order to feed the riser heating systems based on heated fluids circulation. Studies of heat exchange performed indicated a great potential for the risers heating by the flow of heated water through the annular of a Pipe-in-Pipe riser, by using a WHRU (Waste Heat Recovery Unit) to recover the power discharged into the atmosphere from the turbo–generators. It was identified the possibility of heating Pipe-in-Pipe risers by circulating heated fresh water in a closed loop with water return to the production unit, or by coupling the riser heating system with the water injection system, using all the facilities for treatment and pumping of water injection. This paper aims to describe the methodology considered in the development of a conceptual design of a heating system for a Pipe-in-Pipe riser, by the flow of heated water in the annular, in a Free Standing Hybrid Riser configuration. The paper will also present the characteristics associated with the two possibilities of heated water circuit, as well as advantages and disadvantages of each system, and the aspects related to subsea production layout.
Звіти організацій з теми "Water-supply Use studies"
1
Perera, Duminda, Vladimir Smakhtin, Spencer Williams, Taylor North, and Allen Curry. Ageing Water Storage Infrastructure: An Emerging Global Risk. United Nations University Institute for Water, Environment and Health, January 2021. http://dx.doi.org/10.53328/qsyl1281.
Повний текст джерелаАнотація:
The Report provides an overview of the current state of knowledge on the ageing of large dams –an emerging global development issue as tens of thousands of existing large dams have reached or exceeded an “alert” age threshold of 50 years, and many others will soon approach 100 years. These aged structures incur rapidly rising maintenance needs and costs while simultaneously declining their effectiveness and posing potential threats to human safety and the environment. The Report analyzes large dam construction trends across major geographical regions and primary dam functions, such as water supply, irrigation, flood control, hydropower, and recreation. Analysis of existing global datasets indicates that despite plans in some regions and countries to build more water storage dams, particularly for hydropower generation, there will not be another “dam revolution” to match the scale of the high-intensity dam construction experienced in the early to middle, 20th century. At the same time, many of the large dams constructed then are aging, and hence we are already experiencing a “mass ageing” of water storage infrastructure. The Report further explores the emerging practice of decommissioning ageing dams, which can be removal or re-operation, to address issues of ensuring public safety, escalating maintenance costs, reservoir sedimentation, and restoration of a natural river ecosystem. Decommissioning becomes the option if economic and practical limitations prevent a dam from being upgraded or if its original use has become obsolete. The cost of dam removal is estimated to be an order of magnitude less than that of repairing. The Report also gives an overview of dam decommissioning’s socio-economic impacts, including those on local livelihoods, heritage, property value, recreation, and aesthetics. Notably, the nature of these impacts varies significantly between low- and high-income countries. The Report shows that while dam decommissioning is a relatively recent phenomenon, it is gaining pace in the USA and Europe, where many dams are older. However, it is primarily small dams that have been removed to date, and the decommissioning of large dams is still in its infancy, with only a few known cases in the last decade. A few case studies of ageing and decommissioned large dams illustrate the complexity and length of the process that is often necessary to orchestrate the dam removal safely. Even removing a small dam requires years (often decades), continuous expert and public involvement, and lengthy regulatory reviews. With the mass ageing of dams well underway, it is important to develop a framework of protocols that will guide and accelerate the process of dam removal. Overall, the Report aims to attract global attention to the creeping issue of ageing water storage infrastructure and stimulate international efforts to deal with this emerging water risk. This Report’s primary target audiences are governments and their partners responsible for planning and implementing water infrastructure development and management, emphasizing adaptat
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Marshall, Amber, Krystle Turner, Carol Richards, Marcus Foth, Michael Dezuanni, and Tim Neale. A case study of human factors of digital AgTech adoption: Condamine Plains, Darling Downs. Queensland University of Technology, December 2021. http://dx.doi.org/10.5204/rep.eprints.227177.
Повний текст джерелаАнотація:
As global agricultural production methods and supply chains have become more digitised, farmers around the world are adopting digital AgTech such as drones, Internet of Things (IoT), remote sensors, blockchain, and satellite imagery to inform their on-farm decision-making. While early adopters and technology advocates globally are spruiking and realising the benefits of digital AgTech, many Australian farmers are reluctant or unable to participate fully in the digital economy. This is an important issue, as the Australian Government has said that digital farming is essential to meeting its target of agriculture being a $100billion industry by 2030. Most studies of AgTech adoption focus on individual-level barriers, yielding well-documented issues such as access to digital connectivity, availability of AgTech suppliers, non-use of ICTs, and cost-benefit for farmers. In contrast, our project took an ‘ecosystems’ approach to study cotton farmers in the Darling Downs region in Queensland, Australia who are installing water sensors, satellite imagery, and IoT plant probes to generate data to be aggregated on a dashboard to inform decision-making. We asked our farmers to map their local ecosystem, and then set up interviewing different stakeholders (such technology providers, agronomists, and suppliers) to understand how community-level orientations to digital agriculture enabled and constrained on-farm adoption. We identified human factors of digital AgTech adoption at the macro, regional and farm levels, with a pronounced ‘data divide’ between farm and community level stakeholders within the ecosystem. This ‘data divide’ is characterised by a capability gap between the provision of the devices and software that generate data by technology companies, and the ability of farmers to manage, implement, use, and maintain them effectively and independently. In the Condamine Plains project, farmers were willing and determined to learn new, advanced digital and data literacy skills. Other farmers in different circumstances may not see value in such an undertaking or have the necessary support to take full advantage of the technologies once they are implemented. Moreover, there did not seem to be a willingness or capacity in the rest of the ecosystem to fill this gap. The work raises questions about the type and level of new, digital expertise farmers need to attain in the transition to digital farming, and what interventions are necessary to address the significant barriers to adoption and effective use that remain in rural communities. By holistically considering how macro- and micro-level factors may be combined with community-level influences, this study provides a more complete and holistic account of the contextualised factors that drive or undermine digital AgTech adoption on farms in rural communities. This report provides insights and evidence to inform strategies for rural ecosystems to transition farms to meet the requirements and opportunities of Agriculture 4.0 in Australia and abroad.
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Barg, Rivka, Kendal D. Hirschi, Avner Silber, Gozal Ben-Hayyim, Yechiam Salts, and Marla Binzel. Combining Elevated Levels of Membrane Fatty Acid Desaturation and Vacuolar H+ -pyrophosphatase Activity for Improved Drought Tolerance. United States Department of Agriculture, December 2012. http://dx.doi.org/10.32747/2012.7613877.bard.
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Background to the topic: In previous works we have shown that Arabidopsis and tomato over-expressing H+-pyrophosphatase show increased tolerance to drought imposed by withholding irrigation of young plants in pots (Park et al. 2005). In addition, young tobacco plants over-expressing fatty acid desaturase 3 (OEX-FAD3) also showed increasing tolerance to drought stress (Zhang et al 2005), and similarly OEX-FAD3 young tomato plants (unpublished data from ARO), hence raising the possibility that pyramiding the two could further improve drought tolerance in tomato. Based on these findings the specific objects originally set were: 1. To analyze the impact of pyramiding transgenes for enhanced fatty acid desaturation and for elevated H+-PPase activity on tomato yielding under water deficit stress conditions. 2. To elucidate the biochemical relationship between elevated desaturation of the membrane lipids and the activities of selected vacuolar transporters in the context of drought responses. 3. To explore the S. pennellii introgression lines as alternative genetic sources for drought tolerance related to enhanced fatty acid desaturation and/or H+-PPase activity. 4. Since OEX-FAD3 increases the levels of linolenic acid which is the precursor of various oxylipins including the stress hormone Jasmonate. (JA), study of the effect of this transgene on tolerance to herbivore pests was added as additional goal. The Major conclusions, solutions, and achievements are: (1) The facts that ectopic over-expression of vacuolarH+-PPases (in line OEX-AVP1) does not change the fatty acid profile compared to the parental MoneyMaker (MM) line and that elevated level of FA desaturation (by OEX-FAD3) does not change the activity of either H+-PPase, H+-ATPaseor Ca2+ /H+ antiport, indicate that the observed increased drought tolerance reported before for increase FA desaturation in tobacco plants and increased H+PPase in tomato plants involves different mechanisms. (2) After generating hybrid lines bringing to a common genetic background (i.e. F1 hybrids between line MP-1 and MM) each of the two transgenes separately and the two transgenes together the effect of various drought stress regimes including recovery from a short and longer duration of complete water withhold as well as performance under chronic stresses imposed by reducing water supply to 75-25% of the control irrigation regime could be studied. Under all the tested conditions in Israel, for well established plants grown in 3L pots or larger, none of the transgenic lines exhibited a reproducible significantly better drought tolerance compare to the parental lines. Still, examining the performance of these hybrids under the growth practices followed in the USA is called for. (3) Young seedlings of none of the identified introgression lines including the S. pennellii homologs of two of the H+-PPase genes and one of the FAD7 genes performed better than line M82 upon irrigation withhold. However, differences in the general canopy structures between the IL lines and M82 might mask such differences if existing. (4). Over-expression of FAD3 in the background of line MP-1 was found to confer significant tolerance to three important pest insects in tomato: Bordered Straw (Heliothis peltigera), Egyptian cotton leafworm (Spodoptera littoralis) and Western Flower Thrips (Frankliniella occidentalis). Implications: Although the original hypothesis that pyramiding these two trasgenes could improve drought tolerance was not supported, the unexpected positive impact on herbivore deterring, as well as the changes in dynamics of JA biosynthesis in response to wounding and the profound changes in expression of wound response genes calls for deciphering the exact linolenic acid derived signaling molecule mediating this response. This will further facilitate breeding for herbivore pest and mechanical stress tolerance based on this pathway.
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Litaor, Iggy, James Ippolito, Iris Zohar, and Michael Massey. Phosphorus capture recycling and utilization for sustainable agriculture using Al/organic composite water treatment residuals. United States Department of Agriculture, January 2015. http://dx.doi.org/10.32747/2015.7600037.bard.
Повний текст джерелаАнотація:
Objectives: 1) develop a thorough understanding of the sorption mechanisms of Pi and Po onto the Al/O- WTR; 2) determine the breakthrough range of the composite Al/O-WTR during P capturing from agro- wastewaters; and 3) critically evaluate the performance of the composite Al/O-WTR as a fertilizer using selected plants grown in lysimeters and test-field studies. Instead of lysimeters we used pots (Israel) and one- liter cone-tainers (USA). We conducted one field study but in spite of major pretreatments the soils still exhibited high enough P from previous experiments so no differences between control and P additions were noticeable. Due to time constrains the field study was discontinued. Background: Phosphorous, a non-renewable resource, has been applied extensively in fields to increase crop yield, yet consequently has increased the potential of waterway eutrophication. Our proposal impetus is the need to develop an innovative method of P capturing, recycling and reuse that will sustain agricultural productivity while concurrently reducing the level of P discharge from and to agricultural settings. Major Conclusions & Achievements: An innovative approach was developed for P removal from soil leachate, dairy wastewater (Israel), and swine effluents (USA) using Al-based water treatment residuals (Al- WTR) to create an organic-Al-WTR composite (Al/O-WTR), potentially capable of serving as a P fertilizer source. The Al-WTR removed 95% inorganic-P, 80% to 99.9% organic P, and over 60% dissolved organic carbon from the agro-industrial waste streams. Organic C accumulation on particles surfaces possibly enhanced weak P bonding and facilitated P desorption. Analysis by scanning electron microscope (SEM- EDS), indicated that P was sparsely sorbed on both calcic and Al (hydr)oxide surfaces. Sorption of P onto WW-Al/O-WTR was reversible due to weak Ca-P and Al-P bonds induced by the slight alkaline nature and in the presence of organic moieties. Synchrotron-based microfocused X-ray fluorescence (micro-XRF) spectrometry, bulk P K-edge X-ray absorption near edge structure spectroscopy (XANES), and P K-edge micro-XANES spectroscopy indicated that adsorption was the primary P retention mechanism in the Al- WTR materials. However, distinct apatite- or octocalciumphosphatelike P grains were also observed. Synchrotron micro-XRF mapping further suggested that exposure of the aggregate exteriors to wastewater caused P to diffuse into the porous Al-WTR aggregates. Organic P species were not explicitly identified via P K-edge XANES despite high organic matter content, suggesting that organic P may have been predominantly associated with mineral surfaces. In screen houses experiments (Israel) we showed that the highest additions of Al/O-WTR (5 and 7 g kg⁻¹) produced the highest lettuce (Lactuca sativa L. var. longifolial) yield. Lettuce yield and P concentration were similar across treatments, indicating that Al/O- WTR can provide sufficient P to perform similarly to common fertilizers. A greenhouse study (USA) was utilized to compare increasing rates of swine wastewater derived Al/O-WTR and inorganic P fertilizer (both applied at 33.6, 67.3, and 134.5 kg P₂O₅ ha⁻¹) to supply plant-available P to spring wheat (TriticumaestivumL.) in either sandy loam or sandy clay loam soil. Spring wheat straw and grain P uptake were comparable across all treatments in the sandy loam, while Al/O-WTR application to the sandy clay loam reduced straw and grain P uptake. The Al/O-WTR did not affect soil organic P concentrations, but did increase phosphatase activity in both soils; this suggests that Al/O-WTR application stimulated microorganisms and enhance the extent to which microbial communities can mineralize Al/O-WTR-bound organic P. Implications: Overall, results suggest that creating a new P fertilizer from Al-WTR and agro-industrial waste sources may be a feasible alternative to mining inorganic P fertilizer sources, while protecting the environment from unnecessary waste disposal.