Why can slumping be common on a river cut bank?
Answer and explanation
Correct answer: Erosion on the outer bank destabilizes the slope
The governing concept is bank erosion and mass movement in a meandering river. Flow is fastest along the outer bank, or cut bank, so hydraulic action removes material from the toe and steepens the slope. Once basal support is lost, saturated or weakened bank material can rotate and move downslope as a slump. Thus option A is correct; the other choices concern loess, glaciers, or caves.
Frequently asked questions
What is the correct answer to this question?
Erosion on the outer bank destabilizes the slope
Why is this the correct answer?
The governing concept is bank erosion and mass movement in a meandering river. Flow is fastest along the outer bank, or cut bank, so hydraulic action removes material from the toe and steepens the slope. Once basal support is lost, saturated or weakened bank material can rotate and move downslope as a slump. Thus option A is correct; the other choices concern loess, glaciers, or caves.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Theory Base of Accounting.
