A horizontal stratified soil deposit consists of three layers each uniform in itself. The permeabilities of these layers are 8x104 cm/s, 52x104cm/s, and 6x104 cm/s, and their thicknesses are 7, 3 and 10 m, respectively.Find the effective average permeability of the deposit in the vertical direction (mm/s).Select the correct response:13.6x10315.4x1037.7x10-31.1x102

Answered: Find the effective average permeability…

Engineering

Civil Engineering

Find the effective average permeability of the deposit in the vertical direction (mm/s).

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter12: Subsurface Exploration

Section: Chapter Questions

Problem 12.13P

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Concept explainers

Field applications of hydraulic conductivity

Hydraulic conductivity is one of the hydraulic properties of soil defined as a measurement of the ability of a porous medium to permit water movement or fluid flow through it. It is denoted by the letter K. It is influenced by the density and viscosity of the fluid. It is also called permeability. Hydraulic conductivity is defined as the ratio of velocity to the hydraulic gradient. The different methods used to determine the hydraulic conductivity are laboratory methods (constant head permeability tests and falling head tests), in-situ field methods (pumping in and pumping out tests), small scale field tests (infiltration tests and slug tests), and indirect methods such as estimation from grain size, consolidation test data, and horizontal capillary test. The pedotransfer function (PTF) method is a specific empirical estimating approach employed in the soil sciences is also used to determine the hydraulic conductivity of the soil.

Question

A horizontal stratified soil deposit consists of three layers each uniform in itself. The permeabilities of these layers are 8x104 cm/s, 52x104
cm/s, and 6x104 cm/s, and their thicknesses are 7, 3 and 10 m, respectively.
Find the effective average permeability of the deposit in the vertical direction (mm/s).
Select the correct response:
13.6x103
15.4x103
7.7x10-3
1.1x102

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