online_uh_cascade:   Unit hydrograph by the cascade of linear reservoirs 


Formulas

C = tr/K          C1 = C/(2+C)           C2 = (2-C)/(2+C)

Qj+1n+1 = 2C1(Qaverage)j + C2Qj+1n

Reference


INPUT DATA:

Basin area A (km2):     432         Unit hydrograph duration tr (hr):     3         Storage constant K (hr):     9         Number of reservoirs N:     2


SAMPLE OUTPUT:

Please check:  Relative volume under unit hydrograph (1 cm of runoff):  Vuh = 1.00000008.     The correct value is:  Vuh =  1.

Time interval Time (hr) Outflow
(m3/s)
0 0 0
1 3 16.327
2 6 39.650
3 9 48.313
4 12 48.769
5 15 45.049
6 18 39.464
7 21 33.392
8 24 27.569
9 27 22.347
10 30 17.859
11 33 14.111
12 36 11.047
13 39 8.582
14 42 6.623
15 45 5.084
16 48 3.883
17 51 2.954
18 54 2.238
19 57 1.69
20 60 1.273
21 63 0.956
22 66 0.716
23 69 0.536
24 72 0.4
25 75 0.298
26 78 0.221
27 81 0.164
28 84 0.122
29 87 0.09
30 90 0.067
31 93 0.049
32 96 0.036
33 99 0.027
34 102 0.02
35 105 0.015
36 108 0.011
37 111 0.008
38 114 0.006
39 117 0.004
40 120 0.003
41 123 0.002
42 126 0.002
43 129 0.001
44 132 0.001


            


Thank you for running online_uh_cascade.   [090515]