A highway bridge extends across a natural stream (n = 0.035). The natural channel is appro...

A highway bridge extends across a natural stream (n = 0.035). The natural channel is approximated as a rectangular channel 61.0 m (200 ft) wide with a longitudinal slope of 0.001, while the bridge section is approximated as a rectangular earth channel (n = 0.035) 30.5 m (100 ft) wide. Compute the water surface profile through the bridge using an expansion coefficient of 0.6 and a contraction coefficient of 0.3.