Fundamentals of Geotechnical Engineering (MindTap Course List)
5th Edition
ISBN: 9781305635180
Author: Braja M. Das, Nagaratnam Sivakugan
Publisher: Cengage Learning
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Chapter 6, Problem 6.14P
To determine
Find the equivalent hydraulic conductivity for flow in the horizontal direction
Find the ratio of
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2. A confined aquifer has a thickness of 85 ft. An 86-in diameter well drilled to the bottom of the aquifer, as shown in fig 3-10, if the hydraulic conductivity of the aquifer is 10 ft / day, and if water is originally 170 ft deep in the well, calculate approximately the maximum rate of flow that can be pumped from the well without dewatering any part of the aquifer. Assume 1000 ft reasonable value for the radius of influence. What will be the average velocity ( Darcy velocity ) of flow in the aquifer at a distance 20 ft from the center of the well?
Solve for the ratio of equivalent hydraulic conductivity with the following given:
h1 = 2 m
h2 = 2.5 m
h3 = 1.8 m
h4 = 0.9 m
k1 = 1.5E-3 cm/sec
k2 = 2.2E-4 cm/sec
k3 = 1.6E-4 cm/sec
k4 = 4.0E-4 cm/sec
What is the ratio of equivalent hydraulic conductivity?
Estimate the equivalent hydraulic conductivity for flow in the horizontal direction. Also calculate the ratio of kv(eq)/kH(eq). Suppose that k1 = 15 x10^-4 cm/s, k2= 5.0x10^-4 cm/s, k3= 3.0 x10^-4 cm/s, k4= 2.0 x10^-4 cm/s, H1= 1.0 m, H2 = 2.0 m, H3 =1.5 m, H4 =1.0m.
kH(eq) =
kV(eq)/kH(eq)=
Chapter 6 Solutions
Fundamentals of Geotechnical Engineering (MindTap Course List)
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- Define, compare and contrast terms saturated and unsaturated hydraulic conductivity and explain theirimportance in understanding movement of water in the ground.arrow_forwardA confined aquifer bed with a varying thickness as shown in the following figure. The aquifer hydraulic conductivity is 15 m/day. The piezometric heads at x=0 is 15.5m and at x=2000m, head is 22.1m. Determine the flow rate per unit width assuming the flow in theaquifer is essentially horizontal.arrow_forward29. Soil in a field has three layers. Each has a thickness of 3m, 4m, and 3m, from top layer to bottom layer. The hydraulic conductivity of each layer is 0.0043cm/s, 0.0072cm/s, and 0.0018cm/s, respectively. Calculate the effective horizontal hydraulic conductivity.arrow_forward
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