A 2.25-m-internal-diameter circular steel storm drain (n = 0.012) is to discharge water uniformly at a rate of 12.5 m3/s to a distance of 1.5 km. If the maximum depth is to be 1.75 m, determine the required elevation drop.

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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.