Question: The area of a watershed is 0.875 square miles, where the runoff volume is 188 ac-ft. The o index value of this storm is
The area of a watershed is 0.875 square miles, where the runoff volume is 188 ac-ft. The o index value of this storm is equal to? (You need some trial and error to find the answer). Note: 1 sq miles 640 ac (8 points) Rainfall (in) 76543210 6.4 2 4 Time (hr) 6
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