(1) The wearing away of the land surface by running water, wind, ice or other geological agents, including such processes as gravitational creep.
(2) Detachment and movement of soil or rock fragments by wind, water, ice, or gravity.
(3) Erosion includes:
(a) ACCELERATED EROSION — Erosion much more rapid than normal, natural or geologic erosion, primarily as a result of the influence of the activities of man.
(b) FLOODPLAIN EROSION — Abrading and wearing away of the nearly level land situated on either side of a channel due to overflow flooding.
(c) GULLY EROSION — The erosion process whereby water accumulates in narrow channels during and immediately after rainfall or snow or ice melt and actively removes the soil from this narrow area to considerable depths such that the channel would not be obliterated by normal smoothing or tillage operations.
(d) NATURAL EROSION (GEOLOGIC EROSION) — Wearing away of the earth's surface by water, ice or other natural environmental conditions of climate, vegetation, etc., undisturbed by man.
(e) NORMAL EROSION — The gradual erosion of land used by man that does not greatly exceed natural erosion.
(f) RILL EROSION — An erosion process in which numerous small channels only several inches deep are formed; occurs mainly on recently disturbed soils.
(g) SHEET EROSION — The removal of a fairly uniform layer of soil from the land surface by wind or runoff water.
(h) EROSION AND SEDIMENT CONTROL — A system of structural and vegetative measures that minimize soil erosion and off-site sedimentation.