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Dredging
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===Other=== * '''[[Beach nourishment]]''': this is mining sand offshore and placing on a beach to replace sand eroded by storms or wave action. This enhances the recreational and protective function of the beach, which are also eroded by human activity. This is typically performed by a cutter-suction dredge or trailing suction hopper dredge. <ref>{{Cite journal |last1=Davison |first1=A. Todd |last2=Nicholls |first2=Robert J. |last3=Leatherman |first3=Stephen P. |date=1992 |title=Beach Nourishment as a Coastal Management Tool: An Annotated Bibliography on Developments Associated with the Artificial Nourishment of Beaches |url=https://www.jstor.org/stable/4298052 |journal=Journal of Coastal Research |volume=8 |issue=4 |pages=984β1022 |jstor=4298052 |issn=0749-0208}}</ref> * '''[[Peat extraction]]''': ''dredging poles'' or ''dredge hauls'' were used on the back of small boats to manually dredge the beds of [[peat]]-[[Moorland#Heather moorland|moor]] waterways. The extracted peat was used as a fuel. This tradition is now more or less obsolete. The tools are now significantly changed.<ref>{{Cite web |title=Dredge-pump Ship deepen the Estuary of the River Venta - redzet.eu |url=https://www.redzet.eu/en/photo/dredge-pump-ship-deepen-the-estuary-of-the-river-venta-V-025-11 |access-date=2022-07-04 |website=www.redzet.eu}}</ref> * '''Removing rubbish and debris''': often done in combination with maintenance dredging, this process removes non-natural matter from the bottoms of rivers and canals and harbours. {{anchor|Police drag}}Law enforcement agencies sometimes need to use a 'drag' to recover evidence or corpses from beneath the water. * '''[[eutrophication|Anti-eutrophication]]''': A kind of contaminant remediation, dredging is an expensive option for the remediation of eutrophied (or de-oxygenated) water bodies; one of the causes is like mentioned above, [[sewage sludge]]. However, as artificially elevated phosphorus levels in the sediment aggravate the eutrophication process, controlled sediment removal is occasionally the only option for the reclamation of still waters.{{citation needed|date=July 2018}} * '''[[Deep sea mining|Seabed mining]]''': is a possible future use, recovering natural metal [[ore]] nodules from the sea's [[abyssal plain|deepest troughs]].<ref name="reasons">{{cite web |title=EuDA - About dredging - Dredging - Reasons for Dredging |url=https://www.european-dredging.eu/Reasons_for_Dredging |website=www.european-dredging.eu |access-date=3 July 2018 |language=en}}</ref>
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