Dewatering or construction dewatering are terms used to describe the action of removing groundwater or surface water from a construction site.
Normally dewatering process is done by pumping or evaporation and is usually done before excavation or removal of vegetation. Dewatering is also known as the process of removing water from a dam or lake to an existing drainage structure, waterway or wetland.
Dewatering activities must be done appropriately to avoid eroding the soil and polluting receiving waterways. It is also important to choose the best method for dewatering discharge, water quality, volume, velocity and temperature must be measured and recorded and comply with State environment protection policies (SEPPs)