EXTENDED ABSTRACT

The Great Barrier Reef (GBR) lagoon is an internationally significant ecosystem, located off the Queensland coast. The Reef Water Quality Protection Plan aims to halt and reverse the decline in water quality entering the reef. One of its actions requires the development of Water Quality Improvement Plans (WQIP). As sediment is one the key pollutants identified within the Tully catchment, its sources and the impact of changed management need to be identified as part of the WQIP. A range of techniques are available to ascertain the various sources and volumes of sediment being delivered and transported in a catchment. Three techniques include modelling, water qualit