When soil water potential in a sandy loam soil goes from -0.1 to -10 bars, the height of an equivalent column of capillary water increases 100 times. The rate of water movement (the hydraulic conductivity): O increases by a factor of about 100 times increases by a factor of about 10 times remains little affected O decreases by a factor of about 1000 times decreases by a factor of about 10 times

When soil water potential in a sandy loam soil goes from -0.1 to -10 bars, the height of an equivalent column of capillary water increases 100 times. The rate of water movement (the hydraulic conductivity): O increases by a factor of about 100 times increases by a factor of about 10 times remains little affected O decreases by a factor of about 1000 times decreases by a factor of about 10 times

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

When soil water potential in a sandy loam soil goes from -0.1 to -10 bars, the height
of an equivalent column of capillary water increases 100 times. The rate of water
movement (the hydraulic conductivity):
O increases by a factor of about 100 times
increases by a factor of about 10 times
remains little affected
O decreases by a factor of about 1000 times
decreases by a factor of about 10 times

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