a river is 30m wide and has a rectangular shape.At the bridge locatio the flow width is restricted to 25m by the peirs of the bridge and the river bed is approximately horizontal.Describe the flow which obtains underneath the bridge with minimum upstream depth when flood of 450m3/s in the river

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Highway Drainage

Highway drainage is the process of extracting and regulating the excess surface water on the pavement by giving the desired slope. The construction of a highway drain helps to divert the water present on the surface, and sub-grade by the means of slope. Highway drainage systems are a necessary part of smooth functioning of traffic, since the highway drainage systems provide proper disposal of unwanted substances from the highways.