Under which condition does lateral river erosion become more effective than downcutting?
Answer and explanation
Correct answer: In the mature stage when gradient decreases and a floodplain develops
A youthful river usually has a steep gradient and high vertical energy, so downcutting dominates and valleys become deeper. As the river reaches a mature stage, its gradient and vertical energy decrease; discharge is increasingly directed against the banks, meanders widen, and deposition helps form a floodplain. Consequently, lateral erosion becomes relatively more important, making option A correct.
Frequently asked questions
What is the correct answer to this question?
In the mature stage when gradient decreases and a floodplain develops
Why is this the correct answer?
A youthful river usually has a steep gradient and high vertical energy, so downcutting dominates and valleys become deeper. As the river reaches a mature stage, its gradient and vertical energy decrease; discharge is increasingly directed against the banks, meanders widen, and deposition helps form a floodplain. Consequently, lateral erosion becomes relatively more important, making option A correct.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Recording of Transactions (I & II). Topic: Covers the accounting equation.
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