Chapter 10, Problem 10.5.1P

1. Determine the reaction at supports and forces acting on each member. (5 pts each) 35 kN 60 kN 10 kN 1m 2m -3m -3m 3m 3m 25 kN 50 kN 10 kN

Problem 7 Water is flowing in a channel with a rectangular cross-section. The channel has a uniform width of b 10 m, and it is equipped with a broad-crested weir. The height of flow in a channel far upstream of the weir is h₁ 2 m, while the weir is == hweir = 0.8 m above the bed of the channel. = 1. Assuming the flow over the weir is critical, calculate the flow rate in the channel by iteratively solving for the critical depth he. Perform at least 3 iterations. Did the flow rate converge? 2. Given the water depth immediately downstream of the weir is 90% of the critical depth hc, what is the water depth after the flow experiences a hydraulic jump further downstream? 3. How much energy is dissipated by the hydraulic jump? h₁ hweir Figure 7: A subcritical flow goes over a broad-crested weir, and it experiences a hydraulic jump downstream of the weir. Figure not to scale.

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