The figure below shows the layers of soil in a tube 100 mm x 100 mm in cross section. Water is supplied to maintain a constant head difference of H across the sample. Hydraulic conductivities of each soil are tabulated below. All measurements in the figure are millimeters. If

The figure below shows the layers of soil in a tube 100 mm x 100 mm in cross section. Water is supplied to maintain a constant head difference of H across the sample. Hydraulic conductivities of each soil are tabulated below. All measurements in the figure are millimeters. If

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

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

ANSWER THE FOLLOWING QUESTION. SHOW COMPLETE SOLUTION. H = 1.98

Hydraulic conductivity of soil E is 0.002 m/s.

The figure below shows the layers of soil in a tube 100 mm x 100 mm in cross section. Water
is supplied to maintain a constant head difference of H across the sample. Hydraulic
conductivities of each soil are tabulated below. All measurements in the figure are millimeters. If
H =
150–
-200-
-100-
Soil
k (m/s)
A
0.005
0.00625
0.004
D
0.002
a. Determine the equivalent hydraulic conductivity of the system in the direction of the
flow.
b. Find the h, and h2.
c. Determine the rate of flow.

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