What is base level?
A)The highest elevation streams can be found.
B)The downward limit of erosion.
C)The transition from a straight channel stream to a meandering stream.
D)The gradient line along the longitudinal profile of the stream.

Question

Quizplus · Accepted Answer

Base level is the lowest point to which a river can erode its channel. It can be either ultimate (sea level) or temporary (a lake or resistant rock layer). Option A is incorrect as it is referring to the highest elevation of streams, not base level. Option C is incorrect as it is referring to the transition between two types of streams and not base level. Option D is incorrect as it is referring to the gradient line along the longitudinal profile of the stream and not base level.

What Is Base Level