"Dredge" redirects here. For other uses, see Dredge (disambiguation).
"Dredgers" redirects here. For the German municipality, see Dreggers.
"Dragger" redirects here. For the fishing boat, see fishing trawler.
A grab dredge
Dredging is the excavation of material from a water environment. 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. In all but a few situations the excavation is undertaken by a specialist floating plant, known as a dredger.
Usually the main objectives of dredging is to recover material of value, or to create a greater depth of water.[1] Dredging systems can either be shore-based, brought to a location based on barges, or built into purpose built vessels.
Dredging 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. These environmental impacts can significantly hurt marine wildlife populations, contaminate sources of drinking water and interrupt economic activities such as fishing.
^"EuDA - About dredging - Dredging". www.european-dredging.eu. Retrieved 3 July 2018.
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