The Nepean River travels from the Southern Highlands to Broken Bay forming the longest coastal catchment in New South Wales. Flowing through Camden, the Nepean River stretches approximately 180km to join the Grose River just north of Penrith, where it drains into the Hawkesbury River.
Over the years, the Nepean River has experienced notable floods, shaping the region's landscape and necessitating flood mitigation measures to protect surrounding communities.
Flood events are a natural part of the earth’s processes. Some ecosystems are dependent on the flood cycle and the nutrient transfer that results.