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Sediment and seed bank dynamics in river systems of southeastern Australia: Implications for vegetation-based river rehabilitation. Every year in Australia millions of dollars are spent revegetating degraded riparian corridors as part of best practice river rehabilitation. The planting and maintenance of riparian tubestock is an expensive but essential component of current on-the-ground river management across the country. What if the success rate of riparian rehabilitation could be enhanced by ....Sediment and seed bank dynamics in river systems of southeastern Australia: Implications for vegetation-based river rehabilitation. Every year in Australia millions of dollars are spent revegetating degraded riparian corridors as part of best practice river rehabilitation. The planting and maintenance of riparian tubestock is an expensive but essential component of current on-the-ground river management across the country. What if the success rate of riparian rehabilitation could be enhanced by combining geomorphic and ecological knowledge to maximise the germination of native seeds stored in riparian seed banks? As the conservation of biodiversity becomes integral to environmental management, understanding riparian seed bank dynamics and seedling establishment within a geomorphic framework is an essential tool in river rehabilitation practice.Read moreRead less
Setting rehabilitation targets for regulated floodplain wetlands: linking system structure and function. Limited understanding of ecosystem processes in floodplain wetlands impedes adaptive management strategies for combating the decline in aquatic productivity and biodiversity. This project addresses three knowledge gaps critical for effective floodplain wetland management: 1) hierarchical spatial and temporal patterns of structural diversity; 2) correspondence between patterns of structural d ....Setting rehabilitation targets for regulated floodplain wetlands: linking system structure and function. Limited understanding of ecosystem processes in floodplain wetlands impedes adaptive management strategies for combating the decline in aquatic productivity and biodiversity. This project addresses three knowledge gaps critical for effective floodplain wetland management: 1) hierarchical spatial and temporal patterns of structural diversity; 2) correspondence between patterns of structural diversity, rates of system production, and food web structure, and 3) conceptual models of relationships between hydrologic regime and wetland structure and function. The project will improve understanding of the impacts of regulation on floodplain wetlands, contribute to adaptive management, and set rehabilitation targets for delivery of environmental flows for ecosystem sustainability.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
Contemporary sulfur biomineralisation in acid sulfate soil landscapes. This project aims to generate fundamental knowledge on the processes, kinetics and impacts to water quality of contemporary sulfur biomineralisation in acid sulfate soil landscapes. Extreme concentrations of highly reactive sulfides are forming in the surface sediments of floodplain drains, wetlands and agricultural soils. The newly forming sulfides are linked to severe oxygen depletion and acidification of coastal rivers a ....Contemporary sulfur biomineralisation in acid sulfate soil landscapes. This project aims to generate fundamental knowledge on the processes, kinetics and impacts to water quality of contemporary sulfur biomineralisation in acid sulfate soil landscapes. Extreme concentrations of highly reactive sulfides are forming in the surface sediments of floodplain drains, wetlands and agricultural soils. The newly forming sulfides are linked to severe oxygen depletion and acidification of coastal rivers and the complete failure of floodplain vegetation, leaving soils susceptible to erosion. The proposed study will greatly advance our understanding of how our precious coastal floodplain soil and water resources are being degraded, and will guide better land management.
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Schwertmannite in acid sulfate soil landscapes: iron cycling induced acidification. Acid sulfate soils impact over 24 million ha of land throughout the world, 4 million ha of valuable coastal land in Australia alone. Their oxidation and acidification are the cause of catastrophic declines in water quality, aquatic habitat, agricultural productivity and urban infrastructure. The practical benefits of this project arise from an improved understanding of the processes controlling acidification a ....Schwertmannite in acid sulfate soil landscapes: iron cycling induced acidification. Acid sulfate soils impact over 24 million ha of land throughout the world, 4 million ha of valuable coastal land in Australia alone. Their oxidation and acidification are the cause of catastrophic declines in water quality, aquatic habitat, agricultural productivity and urban infrastructure. The practical benefits of this project arise from an improved understanding of the processes controlling acidification and water quality in these areas. Intellectual benefits include the development and application of novel geochemical concepts involving iron minerals relevant to acidity impacted coastal rivers, wetlands and estuaries; this project will enhance Australia's capacity for sustainable environmental management.Read moreRead less
Unraveling the oxidative geochemistry of nanoparticulate mackinawite in acid sulfate soil landscapes. Acid sulfate soils impact over 8 million ha of valuable coastal land in Australia, and over 24 million ha throughout the world. Drainage from acid sulfate soil waterways is a major threat to water quality, ecosystem health, agricultural sustainability and fisheries productivity. The practical benefits of this project arise from an improved understanding of the processes controlling water qualit ....Unraveling the oxidative geochemistry of nanoparticulate mackinawite in acid sulfate soil landscapes. Acid sulfate soils impact over 8 million ha of valuable coastal land in Australia, and over 24 million ha throughout the world. Drainage from acid sulfate soil waterways is a major threat to water quality, ecosystem health, agricultural sustainability and fisheries productivity. The practical benefits of this project arise from an improved understanding of the processes controlling water quality and associated resources in these areas. The intellectual benefits include the development of novel geochemical concepts involving sulfur minerals that are central to coastal rivers, wetlands and estuaries. This project will enhance Australia's capacity for sustainable environmental management.Read moreRead less
Reverting coastal acid sulfate soils to wetlands: Biogeochemical processes and environmental benefits. Reverting acid sulfate soils to wetlands offers an economically viable alternative management opportunity to lock up acidity, metals and nutrients to protect our rivers and estuaries. This study will re-establish a salt water and fresh water wetland in a severely degraded acid sulfate soil area and monitor the biogeochemistry to assess how well wetlands can reduce acid sulfate soil impacts. T ....Reverting coastal acid sulfate soils to wetlands: Biogeochemical processes and environmental benefits. Reverting acid sulfate soils to wetlands offers an economically viable alternative management opportunity to lock up acidity, metals and nutrients to protect our rivers and estuaries. This study will re-establish a salt water and fresh water wetland in a severely degraded acid sulfate soil area and monitor the biogeochemistry to assess how well wetlands can reduce acid sulfate soil impacts. The systematic and detailed investigation being proposed will greatly advance the national and international understanding of how acid sulfate soils can be managed to protect our precious coastal floodplain soils and water resources.Read moreRead less
Drains in acid sulfate soils: behaviour and management for optimal water quality. Water draining from acid sulfate soil (ASS) into rivers via drains is often severely polluted, resulting in massive fish kills and chronic environmental and economic damage. Effective drain management techniques to minimise the export of acidity and deoxygenating drain oozes will be developed. The basic processes that affect hydraulic functioning, acidity and toxic drain ooze export in ASS drainage systems will be ....Drains in acid sulfate soils: behaviour and management for optimal water quality. Water draining from acid sulfate soil (ASS) into rivers via drains is often severely polluted, resulting in massive fish kills and chronic environmental and economic damage. Effective drain management techniques to minimise the export of acidity and deoxygenating drain oozes will be developed. The basic processes that affect hydraulic functioning, acidity and toxic drain ooze export in ASS drainage systems will be addressed. This project will provide the basis for the environmentally sound management of these drains. The technology developed here will be applicable throughout Australia and can be exported overseas, especially to south-east Asia.Read moreRead less
Community Based Water Resources Management. In a time of predicted severe water shortage in the Asia Pacific, the University of Western Sydney and the Council of Scientific and Industrial Research, India have developed research into community based water resources management for regional townships and communities. The objective of this proposal is to connect the two water research organisations in a cross cultural comparison of their respective research programs and to develop a generic model o ....Community Based Water Resources Management. In a time of predicted severe water shortage in the Asia Pacific, the University of Western Sydney and the Council of Scientific and Industrial Research, India have developed research into community based water resources management for regional townships and communities. The objective of this proposal is to connect the two water research organisations in a cross cultural comparison of their respective research programs and to develop a generic model of regional community water use management for developed and developing countries, appropriate to the Asia-Pacific.Read moreRead less
Stream power and river morphology in partly-confined valleys of coastal New South Wales, Australia. Rivers in the escarpment-dominated catchments of coastal NSW are characterised by confined and partly-confined valley-settings in which channels have little capacity to adjust. The key aim of this project is to determine controls on the distribution of floodplains in this landscape. Particular attention will be placed on the role played by stream power in determining the relationship between val ....Stream power and river morphology in partly-confined valleys of coastal New South Wales, Australia. Rivers in the escarpment-dominated catchments of coastal NSW are characterised by confined and partly-confined valley-settings in which channels have little capacity to adjust. The key aim of this project is to determine controls on the distribution of floodplains in this landscape. Particular attention will be placed on the role played by stream power in determining the relationship between valley incision and lateral expansion processes along river courses. Understanding controls on these rivers is critical in determining how they modify their form in response to various disturbance events (whether 'natural' of human-induced). Results will provide a rigorous basis with which to explain cross-catchment variability in river forms and processes, aiding our capacity to predict future adjustments to disturbance and develop river management strategies that 'work with nature'.Read moreRead less