OPEN CHANNEL HYDRAULICS (Elective - II),M.E. (Civil) (Water Resources and Environmental Engg.),2014 Question Paper, University Of Pune Question Paper

University Of Pune Question Paper M.E. (Civil) (Water Resources and Environmental Engg.) OPEN CHANNEL HYDRAULICS (2012 Pattern) (Elective - II) (501609) Time :3 Hours] [Max. Marks : 100 Instructions to the candidates: 1) Answers to the two sections should be written in separate answer books. 2) Answer any three questions from each section. 3) Neat diagrams must be drawn wherever necessary. 4) Figures to the right side indicate full marks. 5) Use of Calculator is allowed. 6) Assume suitable data, if necessary. P2709 [Total No. of Pages : 2 SEAT No. : SECTION - I Q1) a) A 3.6m wide rectangular channel had badly damaged surfaces and had a Manning’s n = 0.030. As a first phase repair, its bed was lined with concrete (n = 0.015). If the depth of flow remains same at 1.2m before and after the repair, what is the increase of discharge obtained as a result of repair. [8] b) Derive Chezy’s formula. Derive relative between Chezy’s ‘C’ and Manning’s ‘n’. [8] Q2) a) Derive Momentum equation for a hydraulic jump with neat sketch and explain why the momentum principle is used in the analysis of hydraulic jump. [8] b) The Rihand dam in U.P., India, has a sloping apron stilling basin with a slope of 0.077. If the depth for a flood flow of 64.0 m3 /s per meter width is 1.93m, estimate the sequent depth, length of the jump and energy loss in the hydraulic jump. [8] Q3) a) What is control section? Where it is useful? Explain any two cases of control section with suitable diagrams. [8] P.T.O. b) A trapezoidal channel having B = 6.0m, side slope m = 2.0, So = 0.0016, Manning’s n = 0.02, carries a discharge of 12.0 m3 /s. Calculate and plot the back water curve produced due to operation of a sluice gate at a downstream side which backs up the water to a depth of 4.0m immediately behind it. Use direct step method. [8] Q4) Write short notes on (any three) [18] a) Standard step method of GVF computation b) Location of hydraulic jump c) M and S profiles of GVF d) Types of open channels. SECTION - II Q5) a) Define Spatially varied Flow and give its detail classification. [8] b) Derive the De Marchi equation for side weirs. [8] Q6) a) What is flood routing? Describe categories of flood routing. List hydraulic and hydrologic flood routing methods. Derive equation for spatially varied flow with increasing discharge. [8] b) Describe explicit method of channel flood routing. [8] Q7) a) What is dam break problem? Derive the equation for discharge intensity in dam break problem. [8] b) Derive differential form of monoclinal rising wave. [8] Q8) Write short notes on (any three) [18] a) Types of surges, b) Classification of bottom racks. c) Method of characteristics, d) Saint Venant’s equation for celerity of wave. 5 5 5

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