A natural, meandering, river channel is modified into a more or less straight and smooth, canal-like channel.Which of the following statements is correct?
A)The natural channel had a lower gradient and less friction than the modified channel.
B)The straight channel has a higher gradient and more friction than the natural channel.
C)The natural channel had a lower gradient and higher friction than the straight channel.
D)There was no change in gradient or friction.

Question

Quizplus · Accepted Answer

The natural channel, with its meandering path, has a lower gradient due to its longer course over the same elevation drop and higher friction because of the increased surface area and obstacles along its path, compared to a straightened channel.

A Natural, Meandering, River Channel Is Modified into a More