Consider a typical flood plotted on a hydrograph, which of following statements is true regarding the rising and falling limb?
A. The falling limb is a mirror image of the rising limb.
B. The falling limb is steeper than the rising limb.
C. There is no known pattern in the relative shape of the rising and failing limbs.
D. The rising limb is steeper than the falling limb.
E. The rising and falling limbs are the shape of a perfect sin wave in natural settings.
Answer: D
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