explain why Rill erosion is an intermediate stage between the sheet and the gully erosion.. Plz no spam answer..
Answers
The surface water flows that cause sheet erosion rarely flow for more than a few metres before concentrating into rills.Rills are shallow drainage lines less than 30cm deep. ... Rill erosion is often described as the intermediate stage between sheet erosion and gully erosion.
Rill erosion is caused by slow movement of water along small channels on bare land with less vegetative cover. Gully erosion creates a deep channels that the surface runoff is further enhanced. The water movement is faster, creating a deeper channels.
Due to the slow movement of water in rill erosion, the soil particles are finer than gully erosion lands. Rills are channels small enough to be smoothed (rectified) by normal tillage. Gullies are larger channels that cannot be restored by normal tillage.