3.1 A basin has a rectangular shape with four raingauges on each corner as shown in fig. below. The gauges read (55,45,50,35) mm. Determine the average rain depth using Thiessen polygon. 1 2 20 km Al-zaidi نصر 11 Civil Engineer 10 km 3

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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.