The Moruya Township is located in south-east New South Wales, approximately 7 km upstream from the coast along the Moruya River. The Moruya River is the name of the estuarine portion of the stream from the coast to the tidal limit which is approximately at the confluence of Wamban Creek, 20 km from the coast. Upstream of this location is the freshwater portion of the stream known as the Deua River. The total catchment of the Deua/Moruya River is in the order of 1500 km . The Moruya River catchment alone is of the order of 500 km.

The purpose of this Flood Study is to develop a calibrated 2D hydraulic model of the Moruya River and its floodplain to facilitate a climate change impact assessment. As part of the development of the hydraulic model, a hydrologic model was developed.