What slope of an open channel is needed to keep the velocity of water in it below 0.75 m/s to prevent scouring of the bottom. The channel has a trapezoidal cross section area with a bottom width of 5.0 m and sides with a slope of 4:1 (horizontal to vertical) and is lined with fine gravel and is to carry 16 m3/s flow. (n= 0.02).

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Q: 0.6 m 30 45°

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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.