Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Chapter 8, Problem 8.11P
To determine
Find the seepage rate through the dam q, in
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An earth dam is shown in the figure below Determine the seepage rate, q, in m^3/day/m length. Given: α1=35°, α2=40°, L1=5 m, H=7 m, H1=10 m, and k= 3x10^4 cm/sec.
.An earth dam is shown in Fig 4 . Determine the seepage rate, q, in m3/day/m length. Given: α1 =350, α2 = 400, L1 = 5 m, H =7 m, H1 =10 m, and k =3 x 10 -4 cm/sec. Use Schaffernak’s solution.
Refer to the cross section of the earth dam shown in the figure. Calculate the rate of seepage through the dam (q in m^3 / min / m) using L. Casagrande’s method
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- An earth dam is shown in the figure below. Determine the seepage rate. Given: a1=48 degrees, a2= 30 degrees, L1=6m, H 17m, H1=21m and k=0.007 cm/s. Use L.Casagrande Methodarrow_forwardTake note: Answer and write your solution on a clean paper clearly. During a flood flow the depth of water in a 12 m wide rectangular channel was found to be 3.5 m and 3.3 m at two sections 300 m apart. The drop in the water-surface elevation was found to be 0.18 m. Assuming Manning’s coefficient to be 0.023, determine the following: a. Average value of k? b. Estimate the flood discharge through the channel ?arrow_forwardFor the two-dimensional flow system shown below (units in meters):Compute the total flow rate under the Dam. X = 4, Y = 8. Note 1: Point A is located in the middle point of the equipotential lines. Point B is located in the middle point of the flow lines.Note 2: Assume e=0.8 (void ratio) and k=10^-3 cm/s (coeff. of permeability).Note 3: Datum is located at the bottom level of the water (right side of Dam).Note 4: Remember, the figure is drawn to scale. So, use the value of 2X+Y to estimate any dimension that you consider necessary.arrow_forward
- The section of a concrete gravity dam with its flow net diagram is shown in Pigure 10.38. The coefficient of permeability of the soil (anistropic) in the vertical and horizontal directions are 0.25 m/day and 0.58 m/day, respectively. The length of dam perpendicular to the paper is 120 m. 1. Determine the number of pressure drops 2. Determine the seepage loss 3. Determine the total amount of water percolated in one year.arrow_forwardRefer to Figure 6.14. Find the flow rate in m3 /s/m length (at right angles to the crosssection shown) through the permeable soil layer given H = 3 m, H1 = 2.5 m, h = 2.8 m, L = 25 m, a = 10°, and k = 0.04 cm/s.arrow_forwardThe figure below represents a system with flow in the horizontal direction. Find the value of each pressure charge, level charge, and total charge in A, B, C, D, E, F, G, plus the real and approximate velocity of water flow plotting all of the above, given that soil porosity = 0.33 and transmittance coefficient = 0.50 cm/secarrow_forward
- Determine the time of concentration for use in the Rational Method for a drainage basin having the hydraulic path described below:Overland Average Grass L = 80’ S = 2.5%Shallow Conc. L = 450’ S = 4.8%Gutter Flow L = 200’ S = 1.9%arrow_forwardRefer to Problem 8.4. Using the flow net drawn, calculate the hydraulic uplift force at the base of the hydraulic structure per meter length (measured along the axis of the structure).8.24 For the hydraulic structure shown in Figure 8.24, draw a flow net for flow through the permeable layer and calculate the seepage loss in m3/day/m.arrow_forwardIn the case of a rectangular channel 3 m wide and 1 m deep, the value of Darcy-Weisbach's constant is 0.038. Using the above values, determine the hydraulic radius Calculate the value of the Chezy’s constant. For a bed slope of 1/2500, find the flow rate.arrow_forward
- In the case of a rectangular channel 3 m wide and 1 m deep, the value of Bazin's constant is 1.75 for earthen channel in rough condition. Calculate the value of the Chezy’s constant. For a bed slope of 1/2500, find the flow rate.arrow_forwardDetermine the following: 1. How high water will rise in piezometers at points a, b, c, d. 2. Total rate of seepagearrow_forwardThe seepage occurring through an earthen dam is represented by a flownet comprising of 10 equipotential drops and 20 flow channels. The coefficient of permeability of the soil is 3 mm/min and the head loss is 5 m. The rate of seepage (expressed in cm3/s per m Length of the dam) through the earthen dam isarrow_forward
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