A Natural,meandering,river Channel Is Modified into a More or Less

question 31

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)All of the above statements are true.

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