Question

give three harms causes by sitting of river beds due to soil erosion ​

Answer 1

First of all its the main reason for Flood and landscape. And it can cause damage to drainage system also. I know only two points. I hope it helped you.

Answer 2

The more erodible the soil, the greater the rate of erosion and the shorter the distance to maximum soil movement. Major factors that affect the amount of erosion are soil cloddiness, surface roughness, wind speed, soil moisture, field size, and vegetative cover.