onlinerouting06:   Time-area method of watershed routing 


Formulas

Q = Ij * Ak             Convolution (See text example).
Reference


INPUT DATA:

Time interval Δt (hr):     1

Number of increments of [effective] rainfall intensity:     6

Increments of [effective] rainfall intensity Ij (cm/hr):     0.5,1.0,2.0,1.5,1.0,0.5

Number of increments of [watershed] drainage area:     4

Increments of [watershed] drainage area Ak (km2):     10,30,20,40


SAMPLE OUTPUT:

Time interval Time (hr) Outflow
(km2-cm/hr)
Outflow
(m3/s)
0 0 0 0
1 1 5 13.889
2 2 25 69.444
3 3 60 166.667
4 4 115 319.444
5 5 135 375
6 6 145 402.778
7 7 95 263.889
8 8 50 138.889
9 9 20 55.556
10 10 0 0


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