About:
Calculate a watershed flow hydrograph according to Soil Conservation Service (SCS).
Module: Hydrology
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| ©WETpython, 2015 |
Function: HYD_scs_hydrograph(l,s,area,p)
Parameters:
- l, river lenght - m;
- s, river slope - m/m;
- area, watershed area, m2;
- p, runoff rain, mm.
Sample code:
from Hydrology import *
l = 69200 # (m)
s = 0.00387 #(m/m)
area = 225*10**6 #m2
# runoff rain (effective rain), mm
p = [16.0,24.0,43.0,19.0,14.0]
(d,hydrogram,volume) = HYD_scs_hydrograph(l,s,area,p)
print("Unit excess rainfall:", d, "h")
print("hydrograph volume:", volume, "m3")
time = 0.0
print ("***Hydrograph***")
for i in range(len(hydrogram)):
print("time (h) | hydrogram (h|m3/s) :",time,"|", hydrogram[i])
time += d
Result:
Unit excess rainfall: 1.925815112733541 h Hydrograph volume: 80444341.16650842 m3 ***Hydrograph*** time (h) | hydrogram (h|m3/s) : 0.0 | 0.0 time (h) | hydrogram (h|m3/s) : 1.925815112733541 | 15.482968124128494 time (h) | hydrogram (h|m3/s) : 3.851630225467082 | 54.19038843444973 time (h) | hydrogram (h|m3/s) : 5.777445338200623 | 134.5082855783663 time (h) | hydrogram (h|m3/s) : 7.703260450934164 | 233.21220736968544 time (h) | hydrogram (h|m3/s) : 9.629075563667705 | 345.46372626961704 time (h) | hydrogram (h|m3/s) : 11.554890676401246 | 433.24022142805944 time (h) | hydrogram (h|m3/s) : 13.480705789134788 | 484.0249981939473 time (h) | hydrogram (h|m3/s) : 15.40652090186833 | 468.61437448410146 time (h) | hydrogram (h|m3/s) : 17.33233601460187 | 423.3893563591242 time (h) | hydrogram (h|m3/s) : 19.258151127335413 | 356.4171629087126 time (h) | hydrogram (h|m3/s) : 21.183966240068955 | 289.20068452552 time (h) | hydrogram (h|m3/s) : 23.109781352802496 | 221.98420614232742 time (h) | hydrogram (h|m3/s) : 25.035596465536038 | 154.7677277591348 time (h) | hydrogram (h|m3/s) : 26.96141157826958 | 93.29837155411423 time (h) | hydrogram (h|m3/s) : 28.88722669100312 | 43.973814835861376 time (h) | hydrogram (h|m3/s) : 30.813041803736663 | 15.38082330071036 time (h) | hydrogram (h|m3/s) : 32.738856916470205 | 3.083601692071024 time (h) | hydrogram (h|m3/s) : 34.66467202920374 | 0.0
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| ©WETpython, 2015 |
