题目
题目

CVEN90051_2025_SM2 Module #1 Practice Quiz

数值题

A rectangular channel 10 m wide form part of a dam spillway. The discharge is 36.5 m3/s when the depth of flow is 0.43 m. At the foot of the spillway the channel is almost horizontal with an hydraulic jump. Calculate the energy loss at the jump. 

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思路分析
The problem describes a rectangular channel with a hydraulic jump occurring downstream of a spillway. We will compute the energy loss across the jump by comparing the specific energy before and after the jump. First, determine the flow area and velocity upstream of the jump. The width b = 10 m and depth y1 = 0.43 m, so the cross-sectional area A1 = b*y1 = 10 × 0.43 = 4.30 m^2. The discharge is......Login to view full explanation

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类似问题

M1Q9 PART #3 (Numerical Answer) The jet emerging from an underflow vertical sluice gate contracts at the "vena contracta" just downstream of the gate, where the depth is 0.7 m. Downstream of the gate, where the flow is unaffected, water depth coincides with the normal depth dn = 3.2 m. The channel has got a rectangular cross section 8 m wide, n = 0.03 and slope S0 = 0.002. PART #3 (numerical calculation): Relative to the vena contracta, at what distance will the hydraulic jump start? (Use a single calculation step only). (Answer in m). 

M1Q9 PART #2 (Numerical Answer) The jet emerging from an underflow vertical sluice gate contracts at the "vena contracta" just downstream of the gate, where the depth is 0.7 m. Downstream of the gate, where the flow is unaffected, water depth coincides with the normal depth dn = 3.2 m. The channel has got a rectangular cross section 8 m wide, n = 0.03 and slope S0 = 0.002. PART #2 (numerical calculation): What is the depth immediately upstream of the hydraulic jump? (Answer in m). 

M1Q10 PART #1 (Numerical Answer) Water discharging from a spillway into a rectangular horizontal (wide) channel goes through a hydraulic jump, before returning to a river (see schematic below). PART #1 (numerical calculation): If the conjugate depth after the jump is d2 = 2.1 m and the corresponding velocity is V2 = 1.79 m/s, what is the height of the step Δ z0 that would allow a uniform transition to the river where flow depth is d3 = 1.5 m and velocity is V3 = 2.5 m/s. (Answer in m). 

M1Q10 PART #2 (METHOD) Water discharging from a spillway into a rectangular horizontal (wide) channel goes through a hydraulic jump, before returning to a river (see schematic below). PART #2 (method): Which method could be used to determine the height of this step?

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