Which of the following is true of the longitudinal profile of most rivers?
A) It always changes at a constant rate from the headwater region to the sea.
B) It is convex in shape.
C) It is concave in shape.
D) It is gentle upstream and steep downstream.

Question

Quizplus · Accepted Answer

The longitudinal profile of most rivers is concave in shape, meaning it is steep upstream (in the headwater region) and gentle downstream (towards the sea). This is due to the erosive power of the water being relatively weak upstream but increasing downstream, creating a V-shaped valley that is more shallow towards the mouth of the river.

Which of the Following Is True of the Longitudinal Profile