Construct the unit hydrograph for the 6-hr storm

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Reference no: EM13319620

A 6.0-hr storm rains on a 25.0 mi2 drainage watershed. Records from a stream gauging stations are shown in the table below.

t, (hr) Q, (ft 3/sec)
0                0
3              400
6              1300
9               2500
12             1700
15             1200
18            800
21            600
24             400
27             300
30             200
33             100
36              0
Total        9500

(a) construct the unit hydrograph for the 6.0-hr storm.

(b) Determine the runoff rate at t = 15.0 hr from a two storm system if the first storm drops 2.0-inches starting at t = 0, and the second storm drops 5.0-incheds starting at t = 12.0 hrs.

Reference no: EM13319620

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