The hydrograph at the upstream end of a river is given in the following table. Develop the hydrograph for the downstream end of this river reach according to the Muskingum-Cunge method. The reach of interest is 4 km long. The channel is trapezoidal (2:1 side slope) with bottom width of 10 m. Assume S0 = 0.001, Δt = 2 km, Δt = 30 min, c = 1.47 m/s, and no lateral inflow.
Time (min) | Flow (m3/s) |
0 | 0 |
30 | 4 |
60 | 14 |
90 | 27 |
120 | 30 |
150 | 29 |
180 | 27 |
210 | 24 |
240 | 18 |
270 | 12 |
300 | 8 |
330 | 5 |
360 | 3 |
390 | 1 |
420 | 0 |
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