Soil moisture variability: a field application of time domain reflectometry

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Creator: 

Stalker, Robert Wayne

Date: 

1984

Abstract: 

Soil moisture variability and available water content are influenced by grain size distribution, organic content, bulk density and soil structure. Each of these soil character!' sties is discussed in relationship to one another and soil moisture variability. A mathematical model is derived for estimating moisture content at field capacity, permanent wilting point and maximum available water content. Seven soil classes are included, ranging from clay to sandy loam.

A brief description of four methods for determining moisture content are presented: Time Domain Reflectometry (TDR), gravimetrics, porous resistance blocks and neutron scattering. The advantages and disadvantages of each method are discussed.

The design of a field study using TDR for determining in situ soil moisture content is presented. TDR lends itself to this application, since it is a non-destructive procedure allowing for repetitive moisture determinations at the same location. Field portability and ease of operation enhance its use.

Subject: 

Soil moisture - Measurement

Language: 

English

Publisher: 

Carleton University

Thesis Degree Name: 

Master of Arts: 
M.A.

Thesis Degree Level: 

Master's

Thesis Degree Discipline: 

Geography

Parent Collection: 

Theses and Dissertations

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