Water at 20C with a density of 0.9982 g/cc and a viscosity of 1 cP is flowing from an open reservoir throught he piping system below and assumed to be discharged at an atmospheric condition. The piping system is composed of 3 m - 3” schedule 40 pipe with a standard gate valve wide open installed and 6 m - 2” schedule 40 pipe. The reservoir has a level of water of 3.5 m. Calculate the average volumetric flow rate in liters per minute. (Use equation 6-37 of Perry’s Handbook (9th edition) to calculate for fanning friction factor).

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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.