The point of confluence of a tributary with a higher order stream is a(n) ________.
A) ultimate base level
B) local base level
C) delta
D) knickpoint
E) none of the above

Question

Quizplus · Accepted Answer

The point of confluence marks a local base level where the smaller tributary joins a larger, higher order stream. It is not an ultimate base level, which is the lowest point to which a river can erode its channel, nor is it a delta or a knickpoint.

The Point of Confluence of a Tributary with a Higher