(transitive) To remove debris and dirt (from something) by purging; to sweep along or off by a current of water.
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It has already been explained that the ebb tide in the Hooghly is a much more powerful scouring agent than the flood tide, that the tide therefore should be used for scouring a channel in preference to the flood whenever it is practicable to use it, hence it is to the body of ebbing water that scours out the fine channel from Akelmeg to Crossing Creek that attention will be principally directed, and not to the flood that scours the channel near the Roopnarain entrance.
dcterms:bibliographicCitation
1865, Hugh Leonard, “Upper Section.—The James and Mary Shoals.”, in Report on the River Hooghly, [...] Bengal, 1865, London: […] George Edward Eyre and William Spottiswoode, printers to the Queen’s Most Excellent Majesty, for Her Majesty's Stationery Office, →OCLC, paragraph 92, page 28: