Field techniques for measuring soil hydraulic properties in unsaturated soils

Research output: Contribution to conferencePaper

Abstract

In-situ permeability tests using soil water contents that easily and quickly measure the saturated-unsaturated hydraulic properties in the unsaturated soils are proposed. The continuous constant head infiltration test and gravity drainage test with intrusive soil moisture device to measure the field-saturated hydraulic conductivity and the field-saturated volumetric water content were performed. The unsaturated soil hydraulic properties were estimated by transient soil water contents during these tests. Sensitivity analysis was carried out under the estimation parameters are limited. The change of the water content in the soil during the constant head infiltration test process and the gravity drainage test process were individually simulated by the seepage flow analysis. From these simulations, functional model of the unsaturated soil hydraulic properties considering the hysteresis phenomenon were identified.

Original languageEnglish
Pages1-7
Number of pages7
DOIs
Publication statusPublished - 2019
Event7th Asia-Pacific Conference on Unsaturated Soils, AP-UNSAT 2019 - Nagoya, Japan
Duration: Aug 23 2019Aug 25 2019

Conference

Conference7th Asia-Pacific Conference on Unsaturated Soils, AP-UNSAT 2019
CountryJapan
CityNagoya
Period8/23/198/25/19

Keywords

  • In-situ permeability test
  • Inverse analysis
  • Parameter estimation
  • Soil hydraulic properties
  • Soil water content

ASJC Scopus subject areas

  • Soil Science

Fingerprint Dive into the research topics of 'Field techniques for measuring soil hydraulic properties in unsaturated soils'. Together they form a unique fingerprint.

  • Cite this

    Takeshita, Y. (2019). Field techniques for measuring soil hydraulic properties in unsaturated soils. 1-7. Paper presented at 7th Asia-Pacific Conference on Unsaturated Soils, AP-UNSAT 2019, Nagoya, Japan. https://doi.org/10.3208/jgssp.v07.001