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.
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