b) An analysis is to be undertaken to check whether there is a need to add more rainfall stations in a sub-basin. Explain the analytical method that can be used, and the data required to compute the number of additional rainfall stations if it is desired to limit the error in the mean to 10%. Use these equations to assist explanation N = ² and C, : 100xom-1

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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.