WATER RESOURCES ENGINEERING
3rd Edition
ISBN: 9781119490579
Author: Mays
Publisher: WILEY
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Chapter 14, Problem 14.3.2P
To determine
The effective length of the crest and the discharge for the given design head.
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Calculate the flow rate through a perpendicular V-notch weir having a head of 1.75' over it. Assume the value of Cd equal to 0.67.
A trapezoidal weir has its non-parallel sides inclined at 4V:1H. It has a base of 4.54 m. and a head of 3.25 m. If Cd(rec) = 0.907 and Cd(tri) = 0.945, determine the actual discharge on the weir (in L/s)
What length of a Cipolletti weir should be constructed in order that the head of flow will be 0.96m when the flow rate is 3.76 m3/s?
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- The head over a ?rpezoidal-crested weir, whose breadth is 5m, is 4m. Given that discharge coefficient is 1.8, calculate the discharge over the weir.arrow_forwardA stream 84 ft. wide carries 60 cfs. Determine the resulting head over a Cipolletti weir 3 ft high and 12 ft long, assuming free overfallarrow_forwardA trapezoidal weir has its non-parallel sides inclined at 4V:1H. It has a base of 4.64 m. And a head of 2.66 m. If Cd(rec) = 0.925 and Cd(tri) = 0.988, determine the actual discharge on the weir (in L/s). Round off to two decimal places.arrow_forward
- A rectangular weir is doubly contracted with a width of 1.35m and a flow depth of 0.39m above the crest. If the discharge over this weir will pass through a 62-degree V-notch weir, what is the depth of flow (m) above the crest? Assume cw = 0.66 for the rectangular weir and cw = 0.56 for the triangular weir.arrow_forwardA singly-contracted weir 1.5m high is located in a 5m wide rectangular channel with a measured discharge of 2.3m3/s. What is the depth of water upstream before it reaches the weir? Considering the velocity of approach.arrow_forwarddischarge = 2.40 m^3/sec velocity = 1.5 m/sec Given that the rectangular-shaped timber flume has the best hydraulic cross-section, 1. Determine the depth of flow and width of flow. 2. Determine what grade it should have. If b = 2.7 meters, y = 0.6 meters, and n = 0.012 3. Determine the percentage less flow that the timber flume would carry.arrow_forward
- A trapezoidal weir of length 4 m and sides inclined 1 horizontal to 1.5 vertical discharges 12 m³/s. If the discharge coefficient is 0.65, find the head of the weir.arrow_forwardA suppressed weir 7.5m long is to discharge 10.125 m3/s of water onto an open channel. The weir factor Cw = 1.88. To what height P may the weir be built, if the water behind the weir must not exceed 1.80m deep?arrow_forwardA Cipolletti weir discharges water with the head of water over the crest being 250 mm. If the head due to velocity of approach is 0.01 m, what will be the excess percentage of flow, when corrected for velocity of approach as compared to when not so corrected?arrow_forward
- Please provide complete solution for this problem. Q. A contracted weir, 5 ft. high is to be installed in a channel 8 ft. wide. The maximum flow over the weir is 54 cfs when the total depth from the channel floor to the water surface is 9 ft. What length of weir should be installed if weir factor is 3.56? a. 2.02 ft b. 1.10 ft c. 0.90 ft d. 2.09 ftarrow_forwarda rectangular weir is doubly contracted with a width of 1.40m and a flow depth of 0.43m above the crest. If the discharge over this weir will pass through a 69degree V notch wier what is the depth of flow (m) above the crest? assume cw=0.66 for the rectangular weir and cw=0.56 for the triangular weirarrow_forwardTrapezoidal weir has a lower base of 3 m and has an angle of 45 for the inclined side. The initial head of the weir is 5 m. Find the discharge if the coefficient of the whole weir is 0.042. a. 8.604 m³/sec b. 9.969 m³/sec c. 10.36 m³/sec d. 5.712 m³/secarrow_forward
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