Field Measurement of Suction, Water Content, and Water Permeability |
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| Authors: | Alessandro Tarantino Andrew M Ridley David G Toll |
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| Institution: | (1) Dipartimento di Ingegneria Meccanica e Strutturale, Università degli Studi di Trento, Via Mesiano, 77, 38050 Trento, Italy;(2) Geotechnical Observations Limited, London, UK;(3) School of Engineering, University of Durham, Durham, UK |
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| Abstract: | This paper presents a review of techniques for field measurement of suction, water content, and water hydraulic conductivity
(permeability). Main problems in the use of field tensiometers are addressed and hints on how to improve tensiometer performance
are given. Advantages and limitations of instruments for indirect measurement of suction including electrical conductivity
sensors, thermal conductivity sensors, dielectric permittivity sensors, filter paper, and psychrometer are discussed. Techniques
for water content measurement based on dielectric methods are then presented. These include time and amplitude domain reflectometry
and capacitance. Finally, a brief overview of methods for measurement of water permeability in the field is presented. |
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| Keywords: | Field monitoring Partially saturated soil Suction Water content Tensiometer Porous block sensors Psychrometer Filter paper TDR sensor ADR sensor Capacitance sensor |
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