A compound channel has symmetric floodplains, each of which is 100 m wide with Manning's n = 0.06, and a main channel (n = 0.03), which is trapezoidal with a bot- tom width of 10 m, side slopes of 1.5:1, and a bank-full depth of 2.5 m. If the chan- nel slope is 0.001 and the total depth is 3.7 m, compute the uniform flow discharge using the divided channel method, first with a vertical interface both with and with- out wetted perimeter included for the main channel, then with a diagonal interface with wetted perimeter excluded.

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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.