Sediment stock-piling and the fate of Australian floodplains. Historic landuse practices have profoundly altered Australia's river systems in less than 200 years. Up to 80% of the sediment and associated pollutants eroded from Australia's catchments are stored in floodplains. The assumption that floodplains can continue to absorb the impacts of upland erosion and land degradation is extremely risky, yet it underpins current catchment management policies in Australia. This project delivers essent ....Sediment stock-piling and the fate of Australian floodplains. Historic landuse practices have profoundly altered Australia's river systems in less than 200 years. Up to 80% of the sediment and associated pollutants eroded from Australia's catchments are stored in floodplains. The assumption that floodplains can continue to absorb the impacts of upland erosion and land degradation is extremely risky, yet it underpins current catchment management policies in Australia. This project delivers essential data on floodplain storage and remobilisation rates using innovative sediment dating and tracing technologies. The significance of this research lies in its immediate relevance to rural industries and the management of Australian riverine and offshore ecosystems.
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Evaluating the role of buffer strips in reducing soil erosion and sediment delivery to water bodies. The role of vegetative buffer strips in reducing soil erosion and sediment delivery to water bodies is well established, but the physical processes and their interactions involved are not well understood. These hydraulic, sediment/chemical transport processes will be modelled from physical principles, recognising that the multi-size characteristics of soil plays a vital role in buffer strip effec ....Evaluating the role of buffer strips in reducing soil erosion and sediment delivery to water bodies. The role of vegetative buffer strips in reducing soil erosion and sediment delivery to water bodies is well established, but the physical processes and their interactions involved are not well understood. These hydraulic, sediment/chemical transport processes will be modelled from physical principles, recognising that the multi-size characteristics of soil plays a vital role in buffer strip effectiveness. This model will be validated using new and existing data sources, including both controlled experiments and field data obtained in Australia and overseas. A user friendly version of the model will be developed for farm managers and advisory services as a design tool.Read moreRead less
Could porous pavements be a part of the urban water solution? With water demand in Australia approaching, and sometimes exceeding, limits of sustainability, there is a pressing need to find alternative water sources. At the same time, urban stormwater pollution remains a major environmental threat. These problems are particularly difficult in urban areas, due to space constraints. This project will test and refine porous pavement technology, which could help solve the 'urban water problem'. R ....Could porous pavements be a part of the urban water solution? With water demand in Australia approaching, and sometimes exceeding, limits of sustainability, there is a pressing need to find alternative water sources. At the same time, urban stormwater pollution remains a major environmental threat. These problems are particularly difficult in urban areas, due to space constraints. This project will test and refine porous pavement technology, which could help solve the 'urban water problem'. Replacing impervious areas with porous pavements will allow urban stormwater to be treated and harvested for re-use. Waterways will be protected from pollution, and the vast quantity of urban stormwater generated (similar to the total reticulated water supplied in Australia) can be harvested to sustain cities.Read moreRead less
Restoring hydrological connectivity of surface and ground waters: Biogeochemical processes and environmental benefits for river landscapes. This project examines the restoration of lateral hydrological connectivity to improve floodplain structure and function. The connections between stream flows and both shallow groundwaters and floodplains are critical in sustaining river landscapes. Degrading land and water management practices compounded by natural climatic extremes have severed this link. ....Restoring hydrological connectivity of surface and ground waters: Biogeochemical processes and environmental benefits for river landscapes. This project examines the restoration of lateral hydrological connectivity to improve floodplain structure and function. The connections between stream flows and both shallow groundwaters and floodplains are critical in sustaining river landscapes. Degrading land and water management practices compounded by natural climatic extremes have severed this link. Restoring hydrological connectivity is vital for replenishing groundwater storage and increasing base flows that affect fundamental riverine processes. Using an innovative approach to sustainable agriculture, our project unites multidisciplinary scientific and industry expertise to investigate the biogeochemical and biophysical effects of secondary floodplain channels and in-stream structures on riverine groundwater processes.Read moreRead less