In order to control flooding, levees are frequently constructed along the banks of rivers to confine flow to the channel. Given this, what happens to the flow velocity and erosive power of the stream during a flood, before the water overflows the levee?
a. Velocity increases because the width does not increase, and the erosive power increases.
b. Velocity increases because depth does not increase, and the erosive power increases.
c. Velocity decreases because the depth of the channel is significantly greater, and the erosive power increases.
d. Velocity decreases because the width of the channel is significantly less and the erosive power decreases.
a. Velocity increases because the width does not increase, and the erosive power increases.
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