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) joint

Question

Quizplus · Accepted Answer

The point of confluence of a tributary with a higher order stream is called a local base level, which is a temporary base level that limits downcutting in the tributary and creates a backwater effect. Ultimate base level refers to the lowest elevation to which a stream can erode its channel, delta refers to the deposition of sediment at the mouth of a river, knickpoint refers to a sudden change in gradient that causes an abrupt increase in stream velocity, and joint refers to a fracture in rock along which there has been no movement.

The Point of Confluence of a Tributary with a Higher