Q- The seepage occurring through an earthen dam is represented by a flow net 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 is

Q- The seepage occurring through an earthen dam is represented by a flow net 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 is

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter6: Hydraulic Conductivity

Section: Chapter Questions

Problem 6.1P

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Problem # 1. A constant head permeability test is performed on a sample of granular soil. The length of the soil sample is 15 cm and the cross-sectional area is 10 cm^2. If a 24 cm^3 volume of water passes through the oil sample in a 3-minute period and the constant head is 30 cm determine the followinga. Determine the coefficient of permeability of the soil.b. Find the discharge velocity.c. Compute the seepage velocity if the void ratio is 0.64.
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A permeable soil layer is underlain by an impervious layer as shown below. Knowing that k = 6 x 10 -3 cm/sec for the permeable layer. Given H = 5.4 m, calculate the rate of seepage through this layer in m 3 /hr. if: α = 5 o α = 7 o α = 9 o α = 12 o Draw a chart α vs. q (i.e. α on the x-axis, and q on the y-axis) and discuss how the slope angle (α) impact the flow rate and explain the reason for such behavior.
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Refer to Figure 7.24. The following data were collected during the field permeability measurement of a confined aquifer using a pumping test. Determine the hydraulic conductivity of the permeable layer. Use Eq. (7.49). Thickness of the aquifer, H = 4.5 m Piezometric level and radial distance of the first observation well: h1 = 2.9 m; r1 = 17.8 m Piezometric level and radial distance of the second observation well: h2 = 1.8 m; r2 = 8.1 m Rate of discharge from pumping, q = 0.5 m3/min
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The bottom of a stream consists of silty clay has a coefficient of permeability of 0.06 m/day has an average depth of 2.0 m. The underlying aquifer of fine sand has an average thickness of 20 m. The coefficient of permeability of fine sand is 3 m/day. Determine the coefficient of leakage. Determine the retardation coefficient. Determine the leakage factor.
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