Question

What is the rate of surface runoff upon hard and impervious rock floor?​

Answer 1

Answer:

• Surface runoff is precipitation runoff over the landscape. Impervious areas cause excessiverunoff. In our section about water storage in the oceans we describe how the oceans act as a large storehouse of water that evaporates to become atmospheric moisture.

Answer 2

Answer

• Simple, straightforward methods of calculating runoff can tell you the amount of water that storms bring to the earth. For a given surface area such as a roof or yard, multiply the area by the inches of rainfall and divide by 231 to obtain the runoff in gallons.