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
Phytoremediation of arsenic contaminated sites using arsenic hyperaccumulating plants. The legacy of using arsenical compounds in pest control activities has resulted in many contaminated sites. Since the inorganic arsenic is carcinogenic, stringent laws have been enforced to control arsenic (As) in the environment. This project investigates the potential of using the recently discovered (Ma et al, 2001) arsenic hyperaccumulating (22,000 mgAs/kgDW) fern, Pteris vittata, in the removal of arsen ....Phytoremediation of arsenic contaminated sites using arsenic hyperaccumulating plants. The legacy of using arsenical compounds in pest control activities has resulted in many contaminated sites. Since the inorganic arsenic is carcinogenic, stringent laws have been enforced to control arsenic (As) in the environment. This project investigates the potential of using the recently discovered (Ma et al, 2001) arsenic hyperaccumulating (22,000 mgAs/kgDW) fern, Pteris vittata, in the removal of arsenic from dip sites and railway tracks in Qld, and orchards in northern NSW. The impacts of growing hyperaccumulating plants on grazing animals and the environment, and the disposal of arsenic from contaminated plants will also be studied.Read moreRead less
Quantifying the Effects of Carbon Dioxide (CO2) Emissions on an Australian Savanna. Queensland Nickel's Yabulu refinery produces 3,400 tonnes of CO2 daily. CO2, a fertiliser, may affect plant growth in surrounding coastal savannas.
QNPL is sponsoring research that uses an open-air CO2-enhancement facility to assess the potential benefits and costs of emissions. An Australian first and a world tropics first, this research will quantify potential impacts of CO2 on vegetation dynamics, soil pro ....Quantifying the Effects of Carbon Dioxide (CO2) Emissions on an Australian Savanna. Queensland Nickel's Yabulu refinery produces 3,400 tonnes of CO2 daily. CO2, a fertiliser, may affect plant growth in surrounding coastal savannas.
QNPL is sponsoring research that uses an open-air CO2-enhancement facility to assess the potential benefits and costs of emissions. An Australian first and a world tropics first, this research will quantify potential impacts of CO2 on vegetation dynamics, soil processes, soil carbon dynamics and livestock management options
Expected outcomes include the validation and extension of biophysical grazing management models, estimation of the carbon sequestering capacity of tropical rangelands, and increased understanding of climate change effects on the Australian tropics.
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Finding lost dust storms: re-evaluation of the last 20 years of meteorological records to advance wind erosion mapping in Australia. The Dust Event Database (DEDB) at Griffith University is the only long term (1960 - present) record of wind erosion in Australia. It is used in many studies of the impact of dust on the terrestrial, atmospheric and marine environments as well as in studies of urban and regional air pollution and environmental health. Through this project, the revision of the DEDB w ....Finding lost dust storms: re-evaluation of the last 20 years of meteorological records to advance wind erosion mapping in Australia. The Dust Event Database (DEDB) at Griffith University is the only long term (1960 - present) record of wind erosion in Australia. It is used in many studies of the impact of dust on the terrestrial, atmospheric and marine environments as well as in studies of urban and regional air pollution and environmental health. Through this project, the revision of the DEDB will provide new knowledge on these impacts of wind erosion processes and will inform environmental policy through its contributions to the Caring for Our Country Program, the national State of the Environment, and the Australian Centre for Rangeland Information Systems.Read moreRead less
Land disposal as a final treatment for saline industrial effluent. Sustainable land disposal of industrial effluent with high salt and nutrient (N) content, requires a different approach to the disposal of sewage effluent. To maintain plant growth, salt needs to be leached from the soil without off-site movement of nutrients, particularly N. Using irrigation and tree planting, methods of achieving this will be developed experimentally in conjunction with the Goodman Fielder Beaudesert Gelatin f ....Land disposal as a final treatment for saline industrial effluent. Sustainable land disposal of industrial effluent with high salt and nutrient (N) content, requires a different approach to the disposal of sewage effluent. To maintain plant growth, salt needs to be leached from the soil without off-site movement of nutrients, particularly N. Using irrigation and tree planting, methods of achieving this will be developed experimentally in conjunction with the Goodman Fielder Beaudesert Gelatin factory, based on development of a detailed understanding of the processes involved in the interlinked mass balances of salt, N and water. A sustainable and ecologically balanced disposal system will have application for many industrial plants with similar wastes.Read moreRead less