GK
SOIL EROSION AND CONSERVATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Last stage of rill formation
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Advanced stage of rill formation
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Pre stage
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None of these
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Detailed explanation-1: -Gully erosion is an advance stage of rill erosion as rill erosion is the advanced stage of sheet erosion. It is the most spectacular form of erosion. Any concentration of surface runoff is a potential source of gully erosion.
Detailed explanation-2: -Rill erosion occurs when runoff water forms small channels as it concentrates down a slope. These rills can be up to 0.3m deep. If they become any deeper than 0.3m they are referred to as gully erosion.
Detailed explanation-3: -Formation Stage: As runoff water concentrates, it scours the top soil in the general slope direction. It usually takes a long time if the top soil is quite resistant to erosion. Development Stage: Causes the gully head to travel upstream and the gully to expand in breadth and depth.