Repeat Problem 5.39 using the STDSTEP.FOR computer program. Start the water surface profil...

Repeat Problem 5.39 using the STDSTEP.FOR computer program. Start the water surface profile computations using normal depth 1,000 ft downstream of the expansion section.

Approximate the rectangular section at the bridge using an eight point cross-section shown below.

Approximate the rectangular section at the bridge using an eight point cross-section show below.

Problem 5.39

A bridge extends over a trapezoidal earth channel (n = 0.035) as shown below. The bridge section is represented by a rectangular concrete channel (n = 0.015) with a bottom width of 15.2 m (50 ft), a longitudinal slope of 0.0005, and a length of 30.5 m (100 ft). The earth channel has a bottom width of 22.9 m (75 ft), 4H:1V side slopes, and a longitudinal slope of 0.001. Compute the water surface profile through

The bridge for a discharge rate of 283.3 cms (10,000 cfs). Use an expansion loss coefficient of 0.6, contraction loss coefficient of 0.3, and n value of 0.015 for the transitions.