A channel resulting from erosion and caused by the concentrated flow of water during or immediately following heavy rains A gully generally is an obstacle to farm machinery and is too deep to be obliterated by ordinary tillage (A rill is of less depth and can be smoothed by ordinary tillage )
A rift or narrow depression running up cliffs and hillsides In descent, best avoided, unless it is a well-known and easily followed route Often contains running water and loose rock
A channel or miniature valley cut by concentrated runoff but through which water commonly flows only during and immediately after heavy rains or during the melting of snow The distinction between "gully" and rill is one of depth A gully is sufficiently deep that it would not be obliterated by normal tillage operations, whereas a rill would be smoothed by ordinary farm tillage
A channel resulting from erosion and caused by the concentrated but intermittent flow of water usually during and immediately following heavy rains Deep enough (usually >0 5 m) to interfere with, and not to be obliterated by, normal tillage operations
A gully is a long narrow valley with steep sides. The bodies of the three climbers were located at the bottom of a steep gully
a deep ditch or channel cut in the earth by running water, usually after a downpour