Determine the runoff rate from a two storm system if the

Reference no: EM13545629

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: EM13545629

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