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Unformatted text preview: (supercritical) d) Alternate depth? (1.458) 4. A rectangular channel 2 m wide carries 2 m 3 /s of water in subcritical uniform flow at a depth of 0.8 m. A frictionless hump is to be installed across the bed. Find the critical hump height? (0.179 m) 30 m 3 m 20 m n = 0.05 n = 0.025 n = 0.10 .5 m 2 1 3m 5. A flow of 1.8 m 3 /s is carried in a rectangular channel 1.6 m wide at a depth of 0.9 m. a) Will critical depth occur at a section where a frictionless hump 15 cm high is installed across the bed? (No) b) Will critical depth occur at a section where a frictionless sidewall constriction (with no hump) reduces the channel width to 1.3 m? (No) c) Will critical depth occur at a section where the hump and sidewall constriction are installed together?...
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