A more vulnerable Great Barrier Reef
The condition of the Great Barrier Reef is in decline. While climate change is considered the most serious long-term risk to coral reefs, in recent decades agricultural pollution has had a major impact on their condition, reducing their
A more vulnerable Great Barrier Reef
The condition of the Great Barrier Reef is in decline. While climate change is considered the most serious long-term risk to coral reefs, in recent decades agricultural pollution has had a major impact on their condition, reducing their resilience to bleaching and cyclones. In particular, fine sediment and associated particulate nutrients reduce water clarity, slowing coral growth, impairing coral recruitment and making coral more vulnerable to disease.
Between 2008 and 2017, the Australian and Queensland governments spent an estimated more than $600 million on improving land management with the aim of improving the quality of water reaching the Great Barrier Reef World Heritage Area (the Reef). About half of the investment is allocated to reducing river loads of fine sediment and particulate nutrients through improved land management. The area draining to the Reef is vast (>420,000 square kilometres), and the investment is not enough to manage all areas. Therefore, locating the major sources of anthropogenic sediment (and nutrients) and understanding how to remediate these landscapes is critical for maximising the return on investment.
Working with partners to find solutions
Our material fluxes research team identifies the major sources, drivers and dynamics of sediment and particulate nutrient fluxes in river basins, and defines land management options for modifying those fluxes. Our strengths are in automated field instrumentation in agricultural landscapes, rivers and coastal waters; sediment source tracing and geomorphic assessment; and modelling erosion and sediment transport processes. We have experience working with rangeland ecologists and the grazing industry to develop practical and effective management solutions.
To integrate our science across disciplines, we collaborate with research institutions such as James Cook University, the Australian Institute o