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

question 105

Multiple Choice

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.