It keeps waterways and ports navigable, and assists coastal protection, land reclamation and coastal redevelopment, by gathering up bottom sediments and transporting it elsewhere. These environmental impacts can significantly hurt marine wildlife populations, contaminate sources of drinking water and interrupt economic activities such as fishing.ĭescription Excavator dredger in Neeme harbour, Estonia (April 2023)ĭredging is excavation carried out underwater or partially underwater, in shallow waters or ocean waters. Dredging systems can either be shore-based, brought to a location based on barges, or built into purpose built vessels.ĭredging has significant environmental impacts: it can disturb marine sediments, leading to both short- and long-term water pollution, destroy important seabed ecosystems, and can release legacy human-sourced toxins captured in the sediment. Usually the main objectives of dredging is to recover material of value or use, or to create a greater depth of water. In all but a few situations the excavation is undertaken by a specialist floating plant, known as a dredger. Possible reasons for dredging include improving existing water features reshaping land and water features to alter drainage, navigability, and commercial use constructing dams, dikes, and other controls for streams and shorelines and recovering valuable mineral deposits or marine life having commercial value. For the fishing boat, see fishing trawler.ĭredging is the excavation of material from a water environment. It is also used as mini dredging pump, which is operated as a subtract, and is generally used in smaller dredging projects.'Dragger' redirects here. It is a self-propaling pump that is operated by a subtract or self-propelled pump. It is generally used for smaller dredgers, such as electric dredging pump, self-propelled dredging pump, which is operated by a subtract or push-type pump. The second type is the self-propelled dredging pump, which is operated by a subtract or push-down pump. A deeper suction pump is also called the water transfer dredging pump, since it is specially designed to control water flow.Ī dredging pump is operated as a subtract, and is used by smaller dredgers. A deeper excavator pump is also called the water transfer dredging pump, which is specially designed for use in small-scale dredging projects. What are the types of dredging pumps used?Ī type of dredging pump is specially designed for using water-based lubricants, such as an electric dredging pump, which is specially designed for use with water-duben pumps.

Submersible dredge pump