Conservation tillage and its potential to affect catchment salt and water balances. Replacement of deep-rooted vegetation with shallow rooted crops has resulted in greater movement of water into groundwater systems, raising in groundwater level and mobilizing salt to the land's surface. The practice of conservation tillage, provides a range of advantages to landholders, but also has the potential to accentuate the risk of salinisation because it increases water infiltration into the soil surfac ....Conservation tillage and its potential to affect catchment salt and water balances. Replacement of deep-rooted vegetation with shallow rooted crops has resulted in greater movement of water into groundwater systems, raising in groundwater level and mobilizing salt to the land's surface. The practice of conservation tillage, provides a range of advantages to landholders, but also has the potential to accentuate the risk of salinisation because it increases water infiltration into the soil surface. This project aims to evaluate the impact of conservation tillage on soil salt profiles in the Condamine-Balonne and Border Rivers Catchments, and to model will the effect of changed landscape salt and water balances on river water quality.Read moreRead less
Ecosystem response to human, veterinary and growth promoting antibiotics in the aquatic environment. The objective of this study is to assess the threat to Australian aquatic ecosystems by antibiotics excreted and/or discarded through human activities each year. Specifically this study aims to: 1) Determine types of antibiotics, concentrations and distribution in surface waters downstream from potential sources; 2) Investigate bacterial resistance and bacterial community changes to antibiotic c ....Ecosystem response to human, veterinary and growth promoting antibiotics in the aquatic environment. The objective of this study is to assess the threat to Australian aquatic ecosystems by antibiotics excreted and/or discarded through human activities each year. Specifically this study aims to: 1) Determine types of antibiotics, concentrations and distribution in surface waters downstream from potential sources; 2) Investigate bacterial resistance and bacterial community changes to antibiotic compounds entering the aquatic environment; 3) Determine the influence of antibiotics on key ecological processes performed by bacteria - e.g. nitrogen cycle; 4) Assess effect on, and efficiency of, various effluent treatments in removing antibiotics and direct improvements for future removal.Read moreRead less
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