A water catchment area is an area where water is collected by the natural landscape. When it rains, water flows into watercourses as stormwater (rainwater plus anything else it picks up along the way) or seeps into the ground and flows into a groundwater system. If you can imagine your hands cupped together – this would be the water catchment, and the creases in your hands would be the watercourses or creeks!
The watercourses located within the Holroyd City Council area are a part of three major catchments - Duck River Catchment, Parramatta River Catchment and Georges River Catchment. The table below identifies the main catchments within the Local Government Area and the creeks which form part of these catchments.
In urban areas, rain that falls on roofs, paved areas like driveways, roads and footpaths, or that flows from gardens and grass fields, is carried away through stormwater pipes and canals to the ocean via creeks and rivers. But stormwater is not just made up of water. Apart from rain, stormwater also catches the grease and oil from driveways, animal droppings, litter, chemicals, soil and pesticides from gardens. Yuck! Holroyd City Council has a Water Quality Management Program in place, to monitor the effects of commercial and residential land use on these watercourses. This means regularly sampling and testing the water quality of our creeks.
Visit the Sydney Catchment Authority for more information about the water catchments in Sydney.