Problem 2: (a) Define: (i) specific energy (ii) Froude number For open-channel flow. What is special about these quantit

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Problem 2 A Define I Specific Energy Ii Froude Number For Open Channel Flow What Is Special About These Quantit 1 (54.74 KiB) Viewed 41 times

Problem 2: (a) Define: (i) specific energy (ii) Froude number For open-channel flow. What is special about these quantities in critical conditions Along, wide channel has a slope of 1:900, a Manning's n of 0.015 m- 1/3 s and a d m3s-1 per metre width. (b) Calculate the normal and critical depths. (c) In a region of the channel the bed is raised by a height of 0.8 m over a length s the flow to be parallel to the bed over this length. Determine the depths upstream downstream and over the raised bed, ignoring frictional losses. Sketch the key fea flow, indicating all hydraulic transitions caused by the bed rise. (d) In the same channel, the bed is lowered by 0.8 m from its original level. Detern depths upstream, downstream and over the lowered bed, ignoring frictional losse flow.