In a drainage system, drainage spacing is 50 m and depth of the impermeable layer below drain level is 3 m. According to the phreatic surface level after drainage shown in table, determine the hydraulic conductivity for the unit drained area and the missing values of Q. Day h (m) Q (liter/day) 3.00 1 1.50 2 1.25 3 1.00 4 0.75

In a drainage system, drainage spacing is 50 m and depth of the impermeable layer below drain level is 3 m. According to the phreatic surface level after drainage shown in table, determine the hydraulic conductivity for the unit drained area and the missing values of Q. Day h (m) Q (liter/day) 3.00 1 1.50 2 1.25 3 1.00 4 0.75

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

: In a drainage system, drainage spacing is 50 m and depth of the impermeable layer below drain level
is 3 m. According to the phreatic surface level after drainage shown in table, determine the hydraulic
conductivity for the unit drained area and the missing values of Q.
Day
h (m) Q (liter/day)
3.00
1
1.50
2
1.25
3
1.00
4
0.75

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