Which of the following statements is not true when comparing river discharge and runoff
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Which of the following statements is not true when comparing river discharge and runoff

[From: ] [author: ] [Date: 11-05-09] [Hit: ]
d.I think its b-Seems the only way to approach this is to say the runoff defines the total volume of flow produced from rainfall over a basin from a single event, where discharge is the instantaneous flow at a cross section.Then you can say runoff is not (a.) a rate, it is the total volume over the entire rainfall event ie 100 year storm produces xxx acre-feet of runoff.......
a. They both measure a rate of water movement
b. They both use an area in their calculation
c. They both use the area of a surface in the calculation
d. They are both measured in a unit of volume per unit of time

I think its b

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Seems the only way to approach this is to say the runoff defines the total volume of flow produced from rainfall over a basin from a single event, where discharge is the instantaneous flow at a cross section.

Then you can say runoff is not (a.) a rate, it is the total volume over the entire rainfall event ie 100 year storm produces xxx acre-feet of runoff.
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