Which of the following may act as a local base level?
A)A lake that a river flows into.
B)A drainage divide.
C)The upper surface of a waterfall.
D)An interfluve.

Question

Quizplus · Accepted Answer

A lake that a river flows into may act as a local base level because it is the point where the river's water stops flowing downstream and starts accumulating in the lake. As a result, upstream erosion is reduced as the water discharges into the lake, raising the water level and reducing the downstream gradient. This process gradually lengthens the river network, making the lake the new reference point for erosion and sediment transport.

Which of the Following May Act as a Local Base