rill erosion takes place when flowing water curves out numerous closely spaced thin chanels while flowing down steep slopes.when rill erosion becomes wider and deeper it forms a heavy type of erosion called gully erosion.
A rill is a much smaller channel. A gully was once a rill that got broader and deeper. There are another differences too: 1- Ratio of width to depth: In gully that ratio is approximately 1:1 but in...
