Effective water harvesting using capillary barrier of unsaturated soils

T. Morn, M. Inoue, G. Komatsu, R. Kadoguchi, Y. Takeshita

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A simple soil layer system which is composed of a fine soil layer underlain by a coarse soil layer provides the characteristics of capillary barrier. Water infiltrated into soil accumulates just above an interface between soil layers due to a physical difference in unsaturated hydraulic properties of soils. As their roots can easily utilize the water stored in the upper soil layer, plants grow effectively even under water saving irrigation. An effect of water stored in the upper soil layer on the plant growth was investigated in the sand soil field. Experiment plots of capillary barrier soil were constructed. Green vegetables were planted, and soil moisture contents were measured in the soils during 35days after seeding. It is found that the infiltration water effectively accumulated in the upper soil layer by the capillary barrier of soils, and the water stored significantly affected the plant growth.

Original languageEnglish
Title of host publication5th Asia-Pacific Conference on Unsaturated Soils 2012
Pages707-710
Number of pages4
Publication statusPublished - Nov 27 2012
Event5th Asia-Pacific Conference on Unsaturated Soils 2012 - Pattaya, Thailand
Duration: Feb 29 2012Mar 2 2012

Publication series

Name5th Asia-Pacific Conference on Unsaturated Soils 2012
Volume2

Other

Other5th Asia-Pacific Conference on Unsaturated Soils 2012
CountryThailand
CityPattaya
Period2/29/123/2/12

Keywords

  • Capillary barrier
  • Hydraulic properties of unsaturated soil
  • Plant growth
  • Soil moisture content
  • Water harvesting

ASJC Scopus subject areas

  • Soil Science

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  • Cite this

    Morn, T., Inoue, M., Komatsu, G., Kadoguchi, R., & Takeshita, Y. (2012). Effective water harvesting using capillary barrier of unsaturated soils. In 5th Asia-Pacific Conference on Unsaturated Soils 2012 (pp. 707-710). (5th Asia-Pacific Conference on Unsaturated Soils 2012; Vol. 2).