Problem 5: A venture flume is placed near the middle of a long rectangular channel with manning's n=0.012 m-1/3 s. the c

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Problem 5 A Venture Flume Is Placed Near The Middle Of A Long Rectangular Channel With Manning S N 0 012 M 1 3 S The C 1 (74.02 KiB) Viewed 31 times

Problem 5: A venture flume is placed near the middle of a long rectangular channel with manning's n=0.012 m-1/3 s. the channel has a width of 5.5m, a discharge of 15 m3 s-1 and a slope of 1:2500 a) Determine the critical depth and the normal depth in the main channel. b) Determine the venture flume width which will just make the flow critical at the contraction. c) If the contraction width is 2 m find the depths just upstream, downstream and at the throat of the venture flume (neglecting friction in this short section) d) Sketch the surface profile. Water flow at 0.8m3 s-1 per meter width down a long, wide spillway of slope 1 in 30 onto a wide apron of slope 1 in 1000.Manning's roughness coefficient n = 0.014 m-1/3 s. on both slopes. a) Find the normal depths in both sections. b) Baffle blocks are placed a short distance downstream of the slope transition to provoke a hydraulic jump. Assuming that flow is normal on both the spillway and downstream of the hydraulic jump, calculate the force per meter width of channel that the blocks must impart. c) Find the head loss across the blocks