The figure presents stratified soil sample in a tube that is 325 mm × 325 mm in cross-sectional area. Water is applied to create a constant head difference of 450 mm across the sample.Find the rate of water supply in cm³/sec The hydraulic conductivities, k, of the soils in the direction of flow through themare as follows:Permeability, k (cm/sec)1.75 x10^-22.23 x10^-34.5 x10^-4SOILLength of soilPorosity, nLa =170 mm21%170 mm29%%3DLc =250 mm37%ABC Water supplyConstant-headdifference+ L.LLe

Answered: Image /qna-images/answer/c57d0a52-6ea7-4b5f-8613-61ca7dbb782d.jpg

The hydraulic conductivities, k, of the soils in the direction of flow through them are as follows: SOIL Permeability, k (cm/sec) Length of soil Porosity, n 1.75 x10^-2 La = 170 mm 21% 2.23 x10^-3 Lb = 170 mm 29% 4.5 x10A-4 Lc = 250 mm 37% ABC

The hydraulic conductivities, k, of the soils in the direction of flow through them are as follows: SOIL Permeability, k (cm/sec) Length of soil Porosity, n 1.75 x10^-2 La = 170 mm 21% 2.23 x10^-3 Lb = 170 mm 29% 4.5 x10A-4 Lc = 250 mm 37% ABC

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

The figure presents stratified soil sample in a tube that is 325 mm × 325 mm in cross-sectional area. Water is applied to create a constant head difference of 450 mm across the sample. Find the rate of water supply in cm³/sec

The hydraulic conductivities, k, of the soils in the direction of flow through them
are as follows:
Permeability, k (cm/sec)
1.75 x10^-2
2.23 x10^-3
4.5 x10^-4
SOIL
Length of soil
Porosity, n
La =
170 mm
21%
170 mm
29%
%3D
Lc =
250 mm
37%
ABC

Water supply
Constant-head
difference
+ L.
L
Le

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