Nutrient Cycling in Lagoon of Islands,Tasmania: management to control eutrophication. Hydro Tasmania manages the Lagoon of Islands, a shallow freshwater lake on Tasmania's central plateau. The lagoon provides irrigation water and supports a significant recreational fishery. Over the last decade the lake has suffered increased nutrient enrichment, despite catchment management works to reduce external nutrient loads.
Preliminary nutrient budgets suggest that a significant proportion of the wat ....Nutrient Cycling in Lagoon of Islands,Tasmania: management to control eutrophication. Hydro Tasmania manages the Lagoon of Islands, a shallow freshwater lake on Tasmania's central plateau. The lagoon provides irrigation water and supports a significant recreational fishery. Over the last decade the lake has suffered increased nutrient enrichment, despite catchment management works to reduce external nutrient loads.
Preliminary nutrient budgets suggest that a significant proportion of the water column nutrient load comes from the sediments, phytoplankton or macrophytes. Internal nutrient loads and loading mechanisms will be characterised. Cost effective strategies for their management will be developed utilising hydrological manipulation - a largely unexplored technique.Read moreRead less
Influence of Impurities in Commercial Solvent Extraction Processes. This project directly supports the solvent extraction industry in Australia. This industry is responsible for generating in excess of $600M annually of export earnings for Australia. This type of technology can be applied in the recovery of base metals such as coper, nickel, cobalt, etc and in the environmental area for the clean up of heavy metals from waste water. Solvent extraction has the advantage of high selectivity that ....Influence of Impurities in Commercial Solvent Extraction Processes. This project directly supports the solvent extraction industry in Australia. This industry is responsible for generating in excess of $600M annually of export earnings for Australia. This type of technology can be applied in the recovery of base metals such as coper, nickel, cobalt, etc and in the environmental area for the clean up of heavy metals from waste water. Solvent extraction has the advantage of high selectivity that enables metals to be recovered and recycled, thus reducing the wastage of these metals in, for example, the chromium plating process.Read moreRead less
The Role of the Interface in Solvent Extraction. This project involves a fundamental study of the kinetics of reactions that occur in solvent extraction processes used for separation of many of Australia's metals from minerals. The understanding gained from this will enable a greater efficiency to be obtained from Australia's minerals industry. In particular, it is intended to investigate the role of additives on the kinetics of metal extraction; these additives either enter the solution from ....The Role of the Interface in Solvent Extraction. This project involves a fundamental study of the kinetics of reactions that occur in solvent extraction processes used for separation of many of Australia's metals from minerals. The understanding gained from this will enable a greater efficiency to be obtained from Australia's minerals industry. In particular, it is intended to investigate the role of additives on the kinetics of metal extraction; these additives either enter the solution from the ore or are added as flocculants during the process, and have a significant effect on the performance. With the move to smaller, shorter residence time contactors, this has become increasingly important if these new contactors are to be used efficiently.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
Sustainable futures of Australian temperate forests: An investigation of coupled carbon, water and energy exchanges from hourly to centennial timescales. Australia's forests are a critical natural resource that must be sustainably managed. We will determine the uptake/release of carbon from old growth and regrowth forests and assess the water budgets of the Melbourne water catchment. We aim to understand the current cycles of carbon, water and energy and how these may change over time (hours to ....Sustainable futures of Australian temperate forests: An investigation of coupled carbon, water and energy exchanges from hourly to centennial timescales. Australia's forests are a critical natural resource that must be sustainably managed. We will determine the uptake/release of carbon from old growth and regrowth forests and assess the water budgets of the Melbourne water catchment. We aim to understand the current cycles of carbon, water and energy and how these may change over time (hours to centuries). We will integrate our observations with state-of-the-art models to improve our predictions of how forests will respond to change. This will aid our management of forests and forested catchments to ensure sustainable and viable water resources and optimise carbon sequestration.Read moreRead less
Use of remote sensing actual evapotranspiration estimates and water delivery data for assessing water use efficiency in an irrigated landscape. Improving management of water in irrigated agriculture will lead to increased sustainability, decreased environmental impacts and increased profitability. Quantifying water use efficiency for an irrigation district is a vital part of improving water management. This project aims to develop new methods for quantifying water use efficiency by combining ac ....Use of remote sensing actual evapotranspiration estimates and water delivery data for assessing water use efficiency in an irrigated landscape. Improving management of water in irrigated agriculture will lead to increased sustainability, decreased environmental impacts and increased profitability. Quantifying water use efficiency for an irrigation district is a vital part of improving water management. This project aims to develop new methods for quantifying water use efficiency by combining actual evapotranspiration estimates with water delivery information at the farm scale for an entire irrigation district. Remote sensing techniques will be utilized to map actual evapotranspiration and water meter data will be combined with cadastral and channel network data to map water delivery.Read moreRead less
Accurately locating the depth and distribution of saline waters with improved shallow conductivity sounding using broadcast radio transmissions. Conductivity meters such as the EM31 are in routine use for mapping shallow salinity, but provide no depth information. This research will provide methodology using broadcast radio transmissions to additionally provide the depth information needed to interpret shallow layering and inhomogeneity. Instruments will initially be tested on the ground, but a ....Accurately locating the depth and distribution of saline waters with improved shallow conductivity sounding using broadcast radio transmissions. Conductivity meters such as the EM31 are in routine use for mapping shallow salinity, but provide no depth information. This research will provide methodology using broadcast radio transmissions to additionally provide the depth information needed to interpret shallow layering and inhomogeneity. Instruments will initially be tested on the ground, but are ultimately intended to be applied from the air, where existing systems have no resolution in the top 5 m. The method will provide crucial root-zone data for precision agriculture in salt-affected areas, and address accurate salt mapping issues in the major efforts to combat Australia's salinity problems.Read moreRead less
ARC/NHMRC Research Network Fluorescence Applications in Biotechnology and Life Sciences. This Network will concentrate Australian research in new applications of fluorescence to biological systems to solve significant problems in health diagnostics, biotechnology and the environment. The scientific goals identified by the Network such as highly selective fluorescent labelling and purpose-engineered fluorochromes will be accompanied by the development of specialised instrumentation. These resear ....ARC/NHMRC Research Network Fluorescence Applications in Biotechnology and Life Sciences. This Network will concentrate Australian research in new applications of fluorescence to biological systems to solve significant problems in health diagnostics, biotechnology and the environment. The scientific goals identified by the Network such as highly selective fluorescent labelling and purpose-engineered fluorochromes will be accompanied by the development of specialised instrumentation. These research directions pursued by strong multi-disciplinary teams spanning biology, chemistry, physics, bioengineering and medicine will benefit from the support of the Network programs. Through its focus on academic - industry collaboration the Network will also facilitate development of basic scientific discoveries into commercial outcomes.Read moreRead less
Impact of recycled and low quality process water on sustainable mineral processing practices. Water is in short supply and needs to be considered as a 'key reagent'. The quality of this reagent can vary widely. For a sustainable mineral processing practice, the use of recycled or low quality/saline process water will be essential for a plant to operate in the future. The major benefit is recognition that significant recycle of process water for flotation is achievable if simple water quality con ....Impact of recycled and low quality process water on sustainable mineral processing practices. Water is in short supply and needs to be considered as a 'key reagent'. The quality of this reagent can vary widely. For a sustainable mineral processing practice, the use of recycled or low quality/saline process water will be essential for a plant to operate in the future. The major benefit is recognition that significant recycle of process water for flotation is achievable if simple water quality control and management practices are implemented. In addition, a better understanding and control of water quality in recycled/saline process water may lead to improved flotation stability and performance, and reduced reagent consumption.Read moreRead less
Fate of endocrine disrupting chemicals in water repellent soil. The fate of endocrine system disrupting chemicals in soils has not been studied, even though some have been linked to human health effects. Many are found in municipal sewage wastes. This project will measure chemical concentrations in water repellent forest plantation soils irrigated with municipal wastewater. The outcome will be data specifically addressing (1) the risks when forest plantations are irrigated with municipal wastewa ....Fate of endocrine disrupting chemicals in water repellent soil. The fate of endocrine system disrupting chemicals in soils has not been studied, even though some have been linked to human health effects. Many are found in municipal sewage wastes. This project will measure chemical concentrations in water repellent forest plantation soils irrigated with municipal wastewater. The outcome will be data specifically addressing (1) the risks when forest plantations are irrigated with municipal wastewater in Victoria and, by extension applicable to other Australian ecosystems, (2) Environment Australia's stated need for information directly applicable to ecosystem and human health risk assessment of the environmental risks posed by endocrine disrupting chemicals.Read moreRead less