Q2/[A]: A 12 m thick layer of sandy soil overlies an impermeable rock. Ground water level (GWL) is at a depth of 2.5m below the top of the soil. Water was pumped out of the soil from a central well at the rate of 2.42m³/hr..and | the drawdown of the water table was noted in 2 observation wells. These were at a radius of 16m and 60m. During pumping the water level in the well nearest to the pump was (3.40m below ground level (bgl) and the furthest wel! was 2.95m bgl. Calculate: I 2 1. The average permeability of the soil in m/s. 2. Calculate the radius of influence of the system. HP- 26 - the method given by

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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.