Which of the following is true of floodplains?
A)they rarely occur in a fluvial landscape.
B)they are erosional landforms.
C)they often evolve after a stream has ceased downcutting at a significant rate.
D)they are the areas of a stream where terraces are present.
E)they interrupt the stream profile.

Question

Quizplus · Accepted Answer

Floodplains often evolve after a stream has ceased downcutting at a significant rate. This occurs when a stream has eroded its channel to a level where it can transport sediment in suspension and deposit it on its banks during floods, resulting in a broad, relatively flat plain adjacent to the stream.

(The other options are incorrect. A is false because floodplains are common in fluvial landscapes. B is incorrect because floodplains are depositional landforms. D is incorrect because terraces are not typically present on floodplains, but rather on adjacent slopes. E is incorrect because floodplains do not interrupt the stream profile, but rather continue the channel gradient at a lower elevation outside the channel.)

Which of the Following Is True of Floodplains