Last edited 05 Mar 2021


Culvert, screen and outfall manual, (CIRIA C786) published by CIRIA in 2019, defines desilting as: ‘Removal of sediment accumulated on the natural or design bed level of a channel or culvert, generally as a maintenance activity.’

It defines dredging as: ‘Underwater excavation, usually including removal of the excavated material and normally involving the riverbed below its natural level.’

Dredging can also be carried out on lakes, rivers, harbours, and so on. For more information see: Dredging.

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