Relevant bibliographies by topics / Fitzroy catchment

Academic literature on the topic 'Fitzroy catchment'

Author: Grafiati
Published: 10 December 2022
Last updated: 19 February 2023

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Journal articles on the topic "Fitzroy catchment"

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Douglas, G. B., P. W. Ford, M. Palmer, R. M. Noble, and R. Packett. "Fitzroy River, Queensland, Australia. II. Identification of Sources of Estuary Bottom Sediments." Environmental Chemistry 3, no. 5 (2006): 377. http://dx.doi.org/10.1071/en06010.

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Environmental Context. The Fitzroy River Basin constitutes a major source of suspended sediment and nutrient fluxes to the southern Great Barrier Reef. Improved land management practices to ameliorate these catchment loads require an understanding of the sediment sources and dynamics. This multidisciplinary geochemical and modelling study provides for the first time a quantitative estimate of sediment sources delivered to, and their degree of retention in, the Fitzroy River Estuary. Abstract. Sources of sediment deposited in the Fitzroy River Estuary (FRE) have been identified and quantified using an integrated geochemical, modelling and reconnaissance soil sampling approach. A companion paper (this volume) identifies the major sources of sediments in impoundments on the major river systems and sediment sampled from flood events in the Fitzroy River Basin (FRB). Sediment within the FRE may display distinct longitudinal variation with little basaltic material retained. Sediments derived from the Bowen Basin, which occupies the greatest portion of the FRB, and from the Surat Basin display the greatest longitudinal variation. All FRB soils have a similar total phosphorus (P) concentration. Thus, in considering P export from the catchment it is the total sediment flux which is of major importance, rather than the relative proportions of individual catchment soils. This research provides crucial new regional scale information on the sediment sources deposited within the FRE.
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Douglas, G. B., P. W. Ford, M. R. Palmer, R. M. Noble, R. J. Packett, and E. S. Krull. "Fitzroy River Basin, Queensland, Australia. IV. Identification of flood sediment sources in the Fitzroy River." Environmental Chemistry 5, no. 3 (2008): 243. http://dx.doi.org/10.1071/en07091.

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Environmental context. During flood events, the Fitzroy River is a major contributor to the loads of suspended sediment and nutrients to the southern Great Barrier Reef. The present geochemical and modelling study provides for the first time a quantitative estimate of the temporal variation in sediment sources over an entire flood hydrograph. Basaltic soils are substantially enriched in this flood event relative to their catchment abundance. Abstract. Suspended sediment collected over a complete flood hydrograph in the Fitzroy River provided an insight into the origin and transport of sediment in this system. Strong temporal trends are evident in the proportions of catchment soil types estimated using a Bayesian mixing model in the fine (<10 μm) fraction of the suspended sediment. These temporal trends were also manifested in changes in mineralogy, major and trace element and Nd–Sr and C–N isotope geochemistry. Tertiary Basaltic soils were the most abundant catchment soil type transported in the flood event studied here, constituting 39% of the <10-μm sediment fraction, but varied between an estimated 20 and 50% of the suspended solids over the course of the flood event. The techniques used here allow quantification and comparison between flow and suspended sediment sources and are widely applicable to other river systems.
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Thornton, C. M., and B. Yu. "The Brigalow Catchment Study: IV. Clearing brigalow (Acacia harpophylla) for cropping or grazing increases peak runoff rate." Soil Research 54, no. 6 (2016): 749. http://dx.doi.org/10.1071/sr15121.

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In Queensland, Australia, large tracts of native vegetation have been cleared for agriculture, resulting in substantial hydrological changes in the landscape. Australia’s longest-running paired catchment study, the Brigalow Catchment Study (BCS), was established in 1965 to monitor hydrological changes associated with land development, particularly that of the 1960s Land Development Fitzroy Basin Scheme. The BCS has unequivocally shown that developing brigalow (Acacia harpophylla) for cropping or for grazing doubles runoff volume. However, to date little research had been undertaken to quantify the changes in peak runoff rate when brigalow is cleared for cropping or grazing. The present study compared peak runoff rates from three brigalow catchments, two of which were subsequently cleared for cropping and pasture. Prior to land development, average peak runoff rates from the three brigalow scrub catchments were 3.2, 5 and 2mmh–1 for catchments 1 to 3 respectively. After development, these rates increased to 6.6mmh–1 from the brigalow scrub control catchment (catchment 1), 8.3mmh–1 from the cropping catchment (catchment 2) and 5.6mmh–1 from the pasture catchment (catchment 3). Peak runoff rate increased significantly from both the cropping and pasture catchments after adjusting for the underlying variation in peak runoff rate due to climatic variation between the pre- and post-development periods. The average peak runoff rate increased by 5.4mmh–1 (96%) for the cropping catchment and by 2.6mmh–1 (47%) for the pasture catchment. Increases in peak runoff rate were most prevalent in smaller events with an average recurrence interval of less than 2 years under cropping and 4 years under pasture.
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Smith, J., G. B. Douglas, L. C. Radke, M. Palmer, and B. P. Brooke. "Fitzroy River Basin, Queensland, Australia. III. Identification of sediment sources in the coastal zone." Environmental Chemistry 5, no. 3 (2008): 231. http://dx.doi.org/10.1071/en07094.

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Environmental context. The Fitzroy River Basin is a major source of suspended sediment and nutrients to the southern Great Barrier Reef lagoon. A reduction in sediment and nutrient loads is necessary to protect coastal reefs and this requires an understanding of the sediment sources. The present geochemical and modelling study provides a quantitative estimate of the spatial and temporal variations in the sources of sediment deposited in the Fitzroy River coastal zone. Abstract. Sediment sources to the Fitzroy River coastal zone have been identified and quantified using an integrated geochemical and modelling approach. The coastal sediments display little geochemical variation as a result of substantial homogenisation during hydrodynamic processes and indicate a sediment composition consistent with derivation from mixed catchment sources. A lack of substantial temporal geochemical variation in the sediment records indicates weathering regimes and hydrodynamic transport have been relatively consistent throughout the Holocene. Despite this apparent geochemical homogeneity, a modelling approach using a Bayesian statistical model revealed changes in catchment sediment sources over time. Variations in the occurrence and intensity of rainfall events in different parts of the catchment as well as land-use changes following European settlement are likely to have had a substantial effect on the relative contributions of the catchment sources delivered to and deposited in the coastal zone. Additionally, large variations in flow events and variable estuary hydrodynamics result in different catchment soil types being delivered and deposited under different conditions. The present study found that basaltic material is the dominant catchment source in the coastal surface sediments with an estimated enrichment of ~3 relative to catchment and estuary abundances. Basaltic soils present as a more recent and extensive, weathered surficial cover are more readily mobilised than other catchment soils and will be transported further within freshwater flood plumes. It is likely that in large flood events, this basaltic material may reach the coral-dominated outer shelf. Improved land management practices to reduce sediment loads can be targeted to the areas supplying the majority of sediment to the coastal zone.
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Hughes, Andrew O., and Jacky C. Croke. "Validation of a spatially distributed erosion and sediment yield model (SedNet) with empirically derived data from a catchment adjacent to the Great Barrier Reef Lagoon." Marine and Freshwater Research 62, no. 8 (2011): 962. http://dx.doi.org/10.1071/mf11030.

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The use of spatially distributed erosion and sediment yield models has become a common method to assess the impacts of land-use changes within catchments and determine appropriate management options. Lack of model validation is, however, increasingly recognised as an issue, especially for models applied at the large-catchment or regional scale. The present study applies the spatially distributed erosion and sediment yield model SedNet to a 6000-km2 subcatchment of the Fitzroy River in central Queensland, Australia. Model outputs are compared with the results from sediment-source tracing, measured floodplain deposition rates and available hydrometric station data. Results indicated that significant improvement can be made to model predictions when catchment-specific observations (such as river bank and gully geometry and gully erosion history) are used to refine model-input parameters. It was also shown that the use of generic input parameters used by previous SedNet applications within the Great Barrier Reef catchment area resulted in overestimates of sediment yields. Previous model applications may have overestimated the significance of post-European catchment disturbance on the sediment yields of the dry-tropical catchments draining to the Great Barrier Reef. Our findings illustrated the value of obtaining empirically derived data to validate spatially distributed models applied at large scales.
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Harris, Paul, and Clare Harris. "Leucaena production in the Fitzroy River catchment, central Queensland, Australia." Tropical Grasslands-Forrajes Tropicales 7, no. 4 (September 3, 2019): 339–41. http://dx.doi.org/10.17138/tgft(7)339-341.

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Hacker, RB. "An evaluation of range regeneration programmes in Western Australia." Rangeland Journal 11, no. 2 (1989): 89. http://dx.doi.org/10.1071/rj9890089.

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Range regeneration programmes and related research are reviewed for three major project areas - the Ord River Catchment, the Fitzroy River Frontage and the Winter Rainiall Arid Zone. Successful regeneration techniques are well established for the Ord River Catchment although the ongoing management of treated areas presents a number of difficulties. Regeneration techniques for the Fitzroy Frontage have not been firmly established but, if economically justifiable, are likely to involve water ponding and the amelioration of soil conditions by organic mulch accumulation. It is argued that extension of the water ponding principle to areas of higher slope than those on which the technique is normally used is likely to be an important component of the development of regeneration procedures in the arid zone. Experience in all three environments suggests that a number of principles apply generally. Control of grazing by native and feral animals is a pre-requisite for successful regeneration in any environment. The rate of response to regeneration treatments seems to be inversely related to the degree of degradation suggesting that less severely degraded areas are likely to provide the best economic return from regeneration programmes. Processes of ecological succession seem important in all regeneration activities in the rangelands and cannot be entirely bypassed by cultural intervention.
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Skroblin, Anja, Andrew Cockburn, and Sarah Legge. "The population genetics of the western purple-crowned fairy-wren (Malurus coronatus coronatus), a declining riparian passerine." Australian Journal of Zoology 62, no. 3 (2014): 251. http://dx.doi.org/10.1071/zo13087.

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We investigate the population genetic structure of the declining western subspecies of the purple-crowned fairy-wren (Malurus coronatus coronatus) in order to guide conservation management recommendations for this riparian habitat specialist. Our analysis of multilocus microsatellite data, from 79 individuals sampled from across the species’ range, indicates that M. c. coronatus occurs as genetically differentiated subpopulations that correspond to catchment boundaries or expansive gaps in habitat along waterways. The genetic similarity of large populations of fairy-wrens on four catchments (Fitzroy, Durack, Drysdale and Victoria) indicates widespread recent gene flow, whereas the high genetic distinctiveness of the Bindoola and Isdell catchments may reflect the current geographic isolation of these smaller populations. Genetic differentiation of these smaller geographically isolated populations affirms the negative effect that habitat degradation and fragmentation can have on population connectivity. A regional-scale approach to conservation with a focus on preventing degradation and enhancing connectivity may be critical to safeguard the persistence of M. c. coronatus subpopulations.
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Cockayne, B. J., A. J. McDougall, T. Espinoza, K. R. Burndred, C. L. Thrupp, C. D. Broadfoot, and M. A. Finn. "Riverine flow and spawning requirements of Macquaria ambigua oriens: implications for conservation and management." Marine and Freshwater Research 64, no. 1 (2013): 42. http://dx.doi.org/10.1071/mf12047.

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Understanding the life-history attributes of aquatic species is integral to the development of environmental-flow strategies in regulated river systems. This is particularly important when species are under continual and increasing pressure from water-resource development. In this study, the water temperature and flow requirements for spawning of the Fitzroy River golden perch (Macquaria ambigua oriens) were investigated over 4 years at 22 sites in the Fitzroy River catchment. Eggs, larvae and young-of-year (YOY) M. ambigua oriens were sampled on a variety of flow events to determine the environmental requirements for spawning. Eggs and larvae of M. ambigua oriens were detected during natural flow events generally with a minimum of 1.5 m river rise and duration of 7 days. Spawning was associated with the peak and/or recession of the first or second post-winter flow event where water temperatures exceeded 24°C. Our data suggests that it is important to protect a range of flows, not just flood flows, as previously documented for this species. The interaction of spawning flows with existing and future water-resource development should be considered to ensure maintenance of the population viability of M. ambigua oriens.
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Islam, F. M. Amirul, Saleh A. Wasimi, and Graham R. Wood. "Macro-scale influence of climate on crop production in the Fitzroy catchment of Central Queensland." Australian Journal of Agricultural Research 50, no. 4 (1999): 529. http://dx.doi.org/10.1071/a96138.

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When the dynamics of a system is too complex to be analytically modelled, it has been found useful to assume that expected values of explanatory variables generate expected values of the response variable, and hence, deviations from the expected value of the response variable can be modelled by a Linear Perturbation Model (LPM) of the explanatory variables. This method is used in this study to develop a technique to update crop forecasts where climate is a major factor in crop production. The study is important because modern cultivars, which are the result of genetic gains, are sensitive to climatic variability, and recent studies with general circulation models suggest that one of the consequences of an increase in greenhouse gases may be greater variability in the climate of a region. The usefulness of the LPM technique in the study of agriculture–climate relationships is tested through application to the Fitzroy catchment in Central Queensland. Since no reported climatic change is yet occurring in the region, the expected values for climatic conditions are obtained through averaging. By contrast, the expected values of crop yield are obtained from trend analysis; such trends are mainly attributable to genetic gains in the recent past. Three crops (wheat, barley, and sunflower) have been studied. Deviations (or perturbations) in crop yields are related, in the framework of LPM, to deviations in minimum, maximum, and average values of rainfall, temperature, and humidity at planting, flowering, and harvesting time. The most significant climatic factors affecting deviations in crop yield are identified. Regression models are developed which are capable of filtering and updating crop forecasts due to any unexpected climatic conditions, assuming consistent genetic trends and management practices.
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Dissertations / Theses on the topic "Fitzroy catchment"

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(1100327), F. M. AMIRUL ISLAM. "The macro-scale influence of climate on crop production in the Fitzroy catchment of Central Queensland." Thesis, 1996. https://figshare.com/articles/thesis/The_macro-scale_influence_of_climate_on_crop_production_in_the_Fitzroy_catchment_of_Central_Queensland/19930196.

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Climate is the most significant factor in determining plant growth and productivity (Buchdahl, 1996). Recent studies with general circulation models suggest that one of the consequences of increase in greenhouse gases may be greater variability in the climate of a region. Given the possibility of increased variations in climatic conditions, it is deemed that the study of the relationship between climate and crop yield would be useful. For a system which is too complex to be explained by the laws of physics, typically, the determination of the relationship is done through multiple regression analysis. The latter approach is adopted in this study.

Yields of four crops - wheat, barley, sunflower, and cotton - are related to minimum, maximum, and average values of rainfall, temperature, and humidity at planting time, flowering time, and harvesting time for the Fitzroy catchment region of Central Queensland. The most significant climatic factors affecting crop yield are identified. Regression models have been developed which are capable of forecasting the variability of crop production in the region due to climatic variations. Consistent genetic trends and use of existing management practices are assumed in such forecasting.

Furthermore, the complex interaction of climate on crop growth is addressed through the application of the statistical tool of path analysis. From the application of stepwise multiple regression analysis techniques, three explanatory variables are identified as important for each of wheat and barley yields and only one variable is identified for each of sunflower and cotton yields. The regression models are discussed in Section 5.3 of Chapter V. By using path analysis it is found that additional variables have indirect influence on wheat and barley yields. Multiple regression analysis could not identify these variables, which are significant but in an indirect way. The path diagram models are discussed in Section 5.4 of Chapter V. Path analysis allowed us to explore the existence of important variables with indirect influence, and the technique provided us with greater information in predicting changes in yields from the vagaries of climate than is ordinarily available from econometric and regression models.

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(9777077), Md Sharif Amir. "Impact of climate change and extreme weather on flood events." Thesis, 2016. https://figshare.com/articles/thesis/Impact_of_climate_change_and_extreme_weather_on_flood_events/13387295.

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Floods are one of the most damaging types of weather-related disasters which pose serious hazards to human property and life in many parts of the world. Extreme weather events like floods will become more frequent and severe due to climate change. In addition, major flooding can result from heavy rainfall during an extreme event in one or more sub-catchments in a large basin. Global climate change can further increase the intensity of extreme events and cause rises in sea level. Change of temperature, potential evaporation and rainfall are also the results of global climate change.
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Books on the topic "Fitzroy catchment"

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J, Duivenvoorden L., Heath B. M, Queensland. Dept. of Natural Resources., and National Eutrophication Management Program (Australia), eds. Eutrophication compendium: Fitzroy River Catchment. [Rockhampton, Qld: Central Queensland University], 1998.

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Conference papers on the topic "Fitzroy catchment"

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"LUCICAT Model as a river flow forecasting tool: an experiment with Fitzroy River catchment of Western Australia." In 20th International Congress on Modelling and Simulation (MODSIM2013). Modelling and Simulation Society of Australia and New Zealand (MSSANZ), Inc., 2013. http://dx.doi.org/10.36334/modsim.2013.l1.islam.

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Reports on the topic "Fitzroy catchment"

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Poelina, Anne, J. Alexander, N. Samnakay, and I. Perdrisat. A Conservation and Management Plan for the National Heritage Listed Fitzroy River Catchment Estate (No. 1). Edited by A. Hayes and K. S. Taylor. Martuwarra Fitzroy River Council; Nulungu Research Institute, The University of Notre Dame Australia., 2020. http://dx.doi.org/10.32613/nrp/2020.4.

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The Martuwarra Fitzroy River Council (Martuwarra Council) has prepared this document to engage widely and to articulate its ambitions and obligations to First Law, customary law and their guardianship authority and fiduciary duty to protect the Martuwarra’s natural and cultural heritage. This document outlines a strategic approach to Heritage Conservation and Management Planning, communicating to a wide audience, the planning principles, key initiatives, and aspirations of the Martuwarra Traditional Owners to protect their culture, identity and deep connection to living waters and land. Finer granularity of action items required to give effect to this Conservation and Management Plan for the National Heritage Listed Fitzroy River Catchment Estate are outlined in section 7 and which will be more fully explored by the Martuwarra Council in the coming months and years.
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