Removal of soil or fill material by the flow of floodwaters. The term is frequently used to describe storm-induced, localized conical erosion around pilings and other foundation supports where the obstruction of flow increases turbulence. See Erosion.
removal of sand or earth from the bottom or banks of a river by the erosive action of flowing water. Erosion of a concrete surface, exposing the aggregate. The action of a flowing liquid as it lifts and carries away the material on the sides or bottom of a waterway, conduit, or pipeline. The enlargement of a flow section of a waterway through the action of the fluid in motion carrying away the material composing the boundary.
The clearing and digging action of flowing air or water, especially the downward erosion caused by stream water in removing material (e.g., soil, rocks) from a channel bed or bank or around in-channel structures.
To rub hard with something rough, as sand or Bristol brick, especially for the purpose of cleaning; to clean by friction; to make clean or bright; to cleanse from grease, dirt, etc., as articles of dress.