Refer to the watershed shown in Figs (a) and (b).Cypress Creek has a rectangular cross sec...

Refer to the watershed shown in Figs (a) and (b).

Cypress Creek has a rectangular cross section with a bottom width of 200 ft, n = 0.03, and S0 = 0.001 ft/ft. East Creek has the same characteristics except that the bottom width is 100 ft. The 100-yr storm hydrographs are shown for both creeks. The assumption is made that the flow in the creeks remains constant above point C and that the 100-yr hydrograph for Cypress Creek includes the inflow from East Creek at point C.

Problem

Assume that East Creek meets Cypress Creek as shown. Using a starting elevation at point C consistent with the 100-yr flow in Cypress Creek, develop the 100-yr water surface profile for East Creek. Use six points between the starting elevation and the elevation y = 1.1yn.

Figure (a)

Figure (b)