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, ∆x - 2 km, ∆t = 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......................l29
180......................27
210......................24
240......................18
270......................12
300........................8
330........................5
360........................3
390........................1
420........................0