Suppose a stream flows from its headwaters, through a reservoir to its mouth in the Gulf of Mexico. Where is ultimate base level?
A) At the Gulf of Mexico
B) At the reservoir
C) At the headwaters

Question

Quizplus · Accepted Answer

Ultimate base level is the level below which a stream cannot erode. In this case, the ultimate base level is the Gulf of Mexico, which is the lowest point that the stream can reach.

Suppose a Stream Flows from Its Headwaters, Through a Reservoir