The Regional Estuaries Initiative is developing catchment models that quantify the amount of water and nutrients (nitrogen and phosphorus) that flow to our rivers and estuaries. This involves understanding the catchment in terms of drainage and land use and how different land uses contribute different amounts of nutrient.

Catchment models will allow us to predict the potential impacts of changing land uses and climate on the health of waterways. Catchment models will link to estuary models to provide a whole-of-system understanding. Together, these models are used to inform investment planning and target on-ground actions that will have the biggest benefit for the estuary and surrounding waterways.

Catchment models are being completed for the Peel-Harvey, Vasse-Wonnerup, Hardy Inlet and Wilson Inlet catchments.