Water flows from a large 4m detention basin (100m by 50m) along a 200mm diameter pipe...

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Civil Engineering

Water flows from a large 4m detention basin (100m by 50m) alonga 200mm diameter pipe for a distance of 100m at a slope of 1:200.The pipe centerline is 300mm above the base of the basin and itdrains freely to a nearby channel. Calculate the steady flow rateif: (a) the flow is assumed ideal, (b) the pipe is consideredsmooth for the purposes of the Moody Diagram. (c) the pipe has arelative roughness of 0.006. (d) the time to empty the basin forcase (c).

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Ans GivenLength of tank 100 mWidth of tank 50 mDepth of tank 4 mDiameter of pipe 200 mm or 020 ma Since flow is ideal no head loss is presentApply Bernoulli equation between point 1 at water surface oftank and point 2 just outside the pipeP1g V122g Z1P2g V222g Z2where P1 and P2 are pressures at point 1 and 2 respectivelyV1 See Answer

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