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
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.
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.