Please design a rapid sand filter that will effectively remove 65% of the suspended solids in a flow of 10 cubic meters per minute. The suspended material consists of particles that are perfectly spherical with a diameter of 10 microns. Please use sand with an effective size of 1 mm and a porosity of 0.5. You should limit your clean bed head loss to 0.5 meters per meter. (Pease use an attachment efficiency, α of 0.75) Viscosity of water =1.0087x10-3 Ns/m2 Density of water =998.23 kg/m3 What are the dimensions of this filter (Depth and Surface Area)?

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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.