Tracing nitrogen through wet tropical aquifers using stable isotopic signatures, molecular markers and gas emissions. The project aims at enabling land managers to reduce the loss of nitrogen into creeks, rivers and estuaries of the Great Barrier Reef catchments. This will improve the economic and environmental viability of primary production while restoring the quality of aquatic and marine ecosystems. The results will identify parts of the landscape where land management needs to change and ov ....Tracing nitrogen through wet tropical aquifers using stable isotopic signatures, molecular markers and gas emissions. The project aims at enabling land managers to reduce the loss of nitrogen into creeks, rivers and estuaries of the Great Barrier Reef catchments. This will improve the economic and environmental viability of primary production while restoring the quality of aquatic and marine ecosystems. The results will identify parts of the landscape where land management needs to change and over what time scale improvements would be apparent. These outputs address the water quality priorites and targets of the 'Reef Water Quality Protection Plan' of the State and National governments and the 'Far North Queensland Natural Resource Management Plan'.Read moreRead less
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