1908 16 751 (heading) Hypothesis of rill-wash applied to the St. Louis region.
1972 A. Young vii. 62 Surface flow may be divided into sheetwash, where the ground is entirely or largely covered by a moving layer of water, and rillwash, when the water flows mainly as micro-channels.
1990 A. S. Trenhaile vii. 134 Frost action, mass movement, and rillwash operate on the valley sides.