Repeat Problem for reach lengths of 6, 12, and 32 km. What happens to the timing and value...

Repeat Problem for reach lengths of 6, 12, and 32 km. What happens to the timing and value of the peak flow? Explain.

Problem

Using only the inflow hydrograph from Example 4.7 (i.e., no precipitation), use HEC-HMS* (http://www.hec.usace.army.mil/software/hec-hms/download. html) to route the hydrograph through a channel using the Muskingum-Cunge routing method. The channel has a trapezoidal cross section with a 3:1 side slope (horizontal:vertical), a Manning’s roughness (n) of 0.039, and a bottom width of 8 meters. Assume there is no loss in the channel. What is the value of peak flow and when does it occur? (*Refer to Chapter 5 for detailed information on HEC-HMS.)