QUESTION 2 2.1 Derive the energy equation for open channel flow from first principles. Make use of a definition sketch t

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Question 2 2 1 Derive The Energy Equation For Open Channel Flow From First Principles Make Use Of A Definition Sketch T 1 (29.61 KiB) Viewed 38 times

QUESTION 2 2.1 Derive the energy equation for open channel flow from first principles. Make use of a definition sketch to support (10) your answer. A proposed sharp-crested weir is to be constructed in a river with a trapezoidal cross-section. The weir will act as the control in the river system. The 1:100 flood is estimated at 550 m/s. At 3 km upstream of the weir, a farmer abstract water by means of a fixed pump station at a reduced height 0.5 m above the normal depth of flow. Determine what the influence of the weir will be on the water level 3 km upstream and whether the pump station will be in danger submerged. Make use of the standard step method with 5-intervals (600 m each). Why is the weir the control-point in the system? Name the water profile. (20) Bund ASSESSOR Central University of Technology, Free State The following data are available: • Longitudinal slope (S): • Roughness (k.): . • Bottom width (b): • Discharge coefficient (C₂): • Side-slopes: • Weir sill height (PJ: • Overflow width (B): 12R Q-18log RS, A AE, AS, -S,) OUROEIONE 0.0018 m/m 0.04 m 0.67 1:3.5 26m 23 m Sp- 24⁰ ex ghalamank [30] MODERATOR Q-C,8.2gH¹s 3