Estimation of water diversion provided by capillary barrier of soils

S. Nakafusa, K. Kobayashi, T. Morii, Y. Takeshita

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

4 Citations (Scopus)

Abstract

Capillary barrier is a simple soil layer system which is composed of a finer soil layer underlain by a coarser soil layer. Water infiltrated into soil is retained above an interface between the soil layers, and, in the case of tilted interface, water retained flows downward along the interface. Water flow downward along the interface accumulates its volume of flow due to continuous supply of infiltration water from the soil surface, and begins to percolate into the coarse soil layer at some length of the diversion. This diversion length is one of important parameters to select soil particle contrast between fine and coarse soils and to determine structural dimensions of capillary barrier. In the study the diversion length of capillary barrier was investigated by field observation of soil moisture in the slope and by laboratory soil box experiment.

Original languageEnglish
Title of host publication5th Asia-Pacific Conference on Unsaturated Soils 2012
Pages643-647
Number of pages5
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
  • Diversion length
  • Unsaturated hydraulic properties of soil

ASJC Scopus subject areas

  • Soil Science

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  • Cite this

    Nakafusa, S., Kobayashi, K., Morii, T., & Takeshita, Y. (2012). Estimation of water diversion provided by capillary barrier of soils. In 5th Asia-Pacific Conference on Unsaturated Soils 2012 (pp. 643-647). (5th Asia-Pacific Conference on Unsaturated Soils 2012; Vol. 2).