The erosion of the bed of a stream by running water, principally by attrition of the detritus carried along by the stream, but also by the solvent action of the water.

See abrasion.

erosion by friction

A general term describing physical or mechanical erosion by diverse processes (wind, glacial, coastal, or fluvial)

Erosion or scour by abrasion in flowing water.

erosion by material being driven into rock. This usually happens at the base of a cliff where eroded material is washed against the cliff face by wave action

(Or wind erosion.) The abrasive action of wind-borne material, especially sand, dust, and ice crystals; a form of weathering. Compare corrosion, erosion.