![]() Aggregate dredging - to extract sands and gravels for construction purposes.ĭredging typically falls into two categories:.Clearance dredging will usually require a licence but may be suitable for self-service licensing. Clearance dredging - to remove material which has accumulated around a structure or asset for a purpose other than to facilitate navigation.If your activity is not exempt then some dredging activities may be suitable for an accelerated licensing process. Navigational dredging will usually require a licence but there is an exemption available for low volume dredging and harbour authorities in certain circumstances. Navigational dredging - to deepen berths and channels for the purpose of navigation. ![]() It includes the removal of material from the sea bed entirely. ![]() These environmental impacts can significantly hurt marine wildlife populations, contaminate sources of drinking water and interrupt economic activities such as fishing.A marine licence is required to carry out a dredging activity in English Waters or Northern Ireland offshore waters.ĭredging involves the use of any device to move material (whether or not suspended in water) from one part of the sea or sea bed to another part. 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 human-sourced toxins captured in the sediment. Dredges have been classified as suction or mechanical. In all but a few situations the excavation is undertaken by a specialist floating plant, known as a dredger.ĭredging is carried out in many different locations and for many different purposes, but the main objectives are usually to recover material of value or use, or to create a greater depth of water. 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. Wikipedia Rate this definition: 0.0 / 0 votesĭredging is the excavation of material from a water environment. ![]()
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