4.34. A lined rectangular concrete drainage channel is 10.0 m wide and carries a flow of 8 m³/s. In order to pass the flow under a roadway, the channel is contracted to a width of 6 m. Under design conditions, the depth of flow just upstream of the contraction is 1.00 m, and the con- traction takes place over a distance of 7 m. (a) If the energy loss in the contraction is equal to V?/2g, where Vị is the average velocity upstream of the contraction, what is the depth of flow in the constriction? (b) Does consideration of energy losses have a significant effect on the depth of flow in the constriction? (c) If the width of the constriction is reduced to 4.50 m and a flow of 8 m³/s is maintained, determine the depth of flow within the constriction (include energy losses). (d) If reducing the width of the constriction to 4.50 m influences the upstream depth, determine the new upstream depth.
4.34. A lined rectangular concrete drainage channel is 10.0 m wide and carries a flow of 8 m³/s. In order to pass the flow under a roadway, the channel is contracted to a width of 6 m. Under design conditions, the depth of flow just upstream of the contraction is 1.00 m, and the con- traction takes place over a distance of 7 m. (a) If the energy loss in the contraction is equal to V?/2g, where Vị is the average velocity upstream of the contraction, what is the depth of flow in the constriction? (b) Does consideration of energy losses have a significant effect on the depth of flow in the constriction? (c) If the width of the constriction is reduced to 4.50 m and a flow of 8 m³/s is maintained, determine the depth of flow within the constriction (include energy losses). (d) If reducing the width of the constriction to 4.50 m influences the upstream depth, determine the new upstream depth.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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