A constant head permeameter has a cross-sectional area of 175 cm2 and is used to measure the hydraulic conductivity of a field sample 40 cm long. If the permeameter discharges 100 ml in 320 seconds under a head difference of 60 cm. a. What is the hydraulic conductivity as measured in the laboratory? b. What is the intrinsic permeability of the sample given that water at 20 C is used for the test? c. Is Darcy's law valid under the given conditions (D = 50 mm)? d. What would be the in situ hydraulic conductivity if the regional groundwater temperature is 12 C

A constant head permeameter has a cross-sectional area of 175 cm2 and is used to measure the hydraulic conductivity of a field sample 40 cm long. If the permeameter discharges 100 ml in 320 seconds under a head difference of 60 cm. a. What is the hydraulic conductivity as measured in the laboratory? b. What is the intrinsic permeability of the sample given that water at 20 C is used for the test? c. Is Darcy's law valid under the given conditions (D = 50 mm)? d. What would be the in situ hydraulic conductivity if the regional groundwater temperature is 12 C

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Concept explainers

Laboratory Determination of Hydraulic Conductivity

Hydraulic conductivity is the measure of flowability of water inside the soil in the presence of a hydraulic gradient. The hydraulic gradient is defined as the difference in the water heads in the soil, which induces a water motion. In simple terms, a hydraulic gradient is the presence of a potential that induces a flow of water.

Question

A constant head permeameter has a cross-sectional area of 175 cm2 and is used to measure the
hydraulic conductivity of a field sample 40 cm long. If the permeameter discharges 100 ml in 320
seconds under a head difference of 60 cm.
a. What is the hydraulic conductivity as measured in the laboratory?
b. What is the intrinsic permeability of the sample given that water at 20 C is used for the test?
c. Is Darcy's law valid under the given conditions (D = 50 mm)?
d. What would be the in situ hydraulic conductivity if the regional groundwater temperature is
12 C

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