Water flows through a set of pipes from a reservoir to the point of use, 12.5 m below the water surface of the reservoir. The first pipe has a diameter and length of 125 mm and 20 m respectively. The second pipe has a diameter of 175 mm. Determine the length of the second pipe if a flow rate of 0.065 m3 /s is required at the outlet of the second pipe. The first pipe has a friction coefficient of 0.008 (Darcy) and the second pipe has a friction coefficient of 0.005 (Darcy). Consider all losses.

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Storm Sewers and Detention

The storm drains system transports rainwater or stormwater and other runoff from roads, parking lots, and roof downpipes directly to nearby creeks, rivers, or the sea without any treatment.