A river is always keeping its dynamic equilibrium. When the river loses its equilibrium because of changes in velocity and other reasons, the river will change its competence and capacity to seek a new equilibrium, resulting in deposition or erosion.
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In the rivers transportation, there are three types of load:
A. dissolved load
B. suspend load
C. bed load
The types of rivers erosion usually include:
A. horizontal erosion
B. headward erosion
C. vertical erosion
D. hydraulic action
Headward erosion lengthens a river toward its head and narrows the drainage divide, resulting in stream capture.
The ways of rivers erosion include:
A. dissolution or corrosion
B. hydraulic action
C. abrasion
D. vetical erosion
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