Why Does a Stream Bottom Erode More Deeply When Its

question 35

Multiple Choice

Why does a stream bottom erode more deeply when its water level rises in a flood?

• A)Since its water velocity remains the same, the increased volume of water can carry more sediment.
• B)Its water level rises, so water velocity increases and it can carry more sediment.
• C)It does not-its stream bottom builds up to match the rise in water level.
• D)Its gradient becomes steeper, so it can erode deeper.
• E)To accommodate the additional water, its velocity slows, and it digs in deeper.

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Two-factor Model

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