Sheet erosion or sheet wash is the even erosion of substrate along a wide area.[1] Sheet erosion occur in wide range of settings such as coastal plains, hillslopes, floodplains and beaches.[2] Water moving fairly uniformly with a similar thickness over a surface is called sheet flow and is the cause of sheet erosion.[2] Sheet erosion implies that any flow of water that causes the erosion is not canalized.[2] If a hillslope surface contains many irregularities sheet erosion may give way to erosion along small channels called rills which can converge forming gullies.[2][3] However, sheet erosion may occur despite some limited unevenness in the sheet flow arising from clods of earth, rock fragments, or vegetation.[2]