In a river 60 ft wide having an average depth of 3.4 ft and a mean velocity of 1.15 ft per sec, a contracted rectangular 30 ft long is to be constructed. Determine the head over the weir, assuming free overfall. Draw the sketch. Solution: Given: River width B = 6ft Ave. depth = 3.4ft Mean velocity: V = 1.15 ft/s Rectangular weir (contacted): L = 30ft Required: Head over the weir: H=?

In a river 60 ft wide having an average depth of 3.4 ft and a mean velocity of 1.15 ft per sec, a contracted rectangular 30 ft long is to be constructed. Determine the head over the weir, assuming free overfall. Draw the sketch. Solution: Given: River width B = 6ft Ave. depth = 3.4ft Mean velocity: V = 1.15 ft/s Rectangular weir (contacted): L = 30ft Required: Head over the weir: H=?

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

-1/3 A long channel of rectangular cross-section with width 3.5 m and streamwise slope 1 in 800 carries a discharge of 15 m³ s¹. Manning's n may be taken as 0.016 m s. A broad-crested weir of height 0.7 m is constructed at the centre of the channel. Determine: (a) the depth far upstream of the weir;
4) Find the discharge of the rectangular, sharp-crested, two-stage weir show below. Assume P = 3ft for the lower crest and that the upper crest touches the edges of the channel it is in.
4. Determine the discharge of the weir having a head of 1.5 m (in L/s). C = 0.61 A) If V-notch were used, 0 = 75° B) If a trapezoidal weir with sides inclined 10° with the vertical and a length of crest is 3 m C) If a rectangular weir 2 m long is used
A circular settling basin is anticipated to receive a flow of 3.5 MGD. The tank is to be designed to have an overflow rate of 800 gpd/ft2. The depth is to be 11 ft. Determine the diameter of the basin (in feet). ? What length of weir (ft) is required to achieve a weir loading of 15,000 gpd/ft show all work
Determine the discharge (L/s) at the weir having a head of 0.813 m. if it is a trapezoidal weir with sides inclined 14.94 degrees with the vertical and a length of crust of 5.38 in. Use Cd = 0.661 and Cd = 0.641
2. Water flows over a sharp-crested triangular weir at a rate of 0.28m/s whose vertex angle 60°. Find the percentage of error in the computed value of the flow if the head measurement had been incorrectly observed as being 0.006m greater than its value. Use C = 0.58. Draw the sketch.
Choose the letter of the correct answer. Please answer honestly and do not just guess. Develop a formula for the discharge over a 90° V-notch weir in terms of head above the bottom of the V. A channel conveys 300 litres/sec of water. At the outlet end there is a 90° V-notch weir for which the coefficient of discharge is 0.58. At what distance above the bottom of the channel should the weir be placed in order to make the depth in the channel 1.30m? a. 0.759 m c. 0.769 m b. 0.749 m d. None of the above From above question, with the weir in this position what is the depth of water in the Cchannel when the flow is 200 litres/sec? a. 1.218 m b. 1.212 m c. 1.232 m d. None of the above It is desired to use the 32 in. pump at 1170 rpm to pump water at 60°C from one reservoir to another 120 ft higher through 1500 ft of 16 in. ID pipe with f = 0.030. Determine the Q. a. 15,000 gpm c. 16,000 gpm 3 b. 15,500 gpm d. None of the above
1. In the upstream portion of a river, it has a rectangular channel 10m wide and 1.2m deep of water flowing with a mean velocity of 0.75 m/s. Determine the height (head H) in meters of a standard rectangular weir considered without contraction at the downstream portion, if the length of weir is half of the upstream channel width. 2. The river is measured through float method. It has a length marking of 10 meters. Trials were made for 10 times and tabulated the following recorded time in seconds: 12.4 15.5 16.8 17.1 14.9 14.4 16.6 17.2 18.2 15.8 Estimate the flow rate in m3/s of the river if the mean velocity is 75% of the maximum velocity at the top surface. The cross-section area of the channel is close to 15m x 2m.
Determine the required length of a contracted weir similar to that shown in Fig. 14.17(b) to pass 15 ft³/s of water. The height of the crest is to be 3 ft from the channel bottom, and the maximum head above the crest is to be 18 in.
குUடும் UTM Water is flowing in a 250 cm w cm width rectangular channel with a unit discharge of 2.4 1/1000 and 0.012 s/m¹/³, The channel bed slope and respectively. If broad Manning's n are a b crested weir is constructed in the channel, determine the height of weir which will create backwater and the flow depth at just upstream of the weir should not exceed 5% of the normal depth. I flow depths above, upstream UTM & UTM 00m³/s.m. Calculate and downstream of the constructed weir. Sketch the flow profiles in the channel and the e the expecte UTM specific energy curve which describes this problem. UTMUTSC &UTM & UTM &UTM
In 28.5 secs, 35,579 L of water is collected. The length of the rectangular weir is 2.15 m, the crest is 450 mm high from the channel bed and it should maintain a constant head of 275 mm. Determine the velocity of approach. Assume there is head loss.
MC X Z Post Attendee-Z X courses/29558/quizzes/169851/take Z Post Attendee-Z X Z Post Attendee-Z X Z Post A gravity concrete dam has a vertical upstream face, a crest width of 2.0 m and a base width of 20 m. The height of water above the heel if 6 m. and the freeboard height is 1.5 m. No water at the toe of the dam. a. draw the distribution of pressure on the dam upstream face and determine the total pressure on the upstream face and location of the center of pressure. b. draw the distribution of the uplift force and determine the total uplift force and its location on the base of the dam. c. determine the total weight of the dam if concrete weighs 23.56 kN/m3 and determine the point where the total weight will be acting on the dam. d. considering the hydrostatic pressure, uplift force and weight of the dam, calculate the righting moment and overturning moment, and the factor of safety against overturing. e, calculate the factor of safety against sliding if the coefficient of friction…