Measurement of subsurface unsaturated hydraulic conductivity

D. F. Holland, Muluneh Yitayew, A. W. Warrick

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Measurement of unsaturated hydraulic conductivity is needed for precise control of water and solutes in the vadose zone. Because of the spatial variation of soils, a large number of surface and subsurface measurements are needed to characterize a field. In this work, permeameters were developed and tested for estimating subsurface unsaturated hydraulic conductivity. The permeameters apply water under tension; they are easy to use and have adequate accuracy. Unsaturated hydraulic conductivity was determined by measuring the steady flow rates for various values of negative pressure. Tests using a soil of known hydraulic conductivity showed that the permeameters provided valid measurements. Two types were used, a porous cloth model that was inflated against the soil and a porous ceramic cup that was rigid. The field testing determined that a rigid design using a ceramic cup coupled to the soil by a layer of fine sand was easier to use, was reliable, and provided good results.

Original languageEnglish (US)
Pages (from-to)21-27
Number of pages7
JournalJournal of Irrigation and Drainage Engineering
Volume126
Issue number1
DOIs
StatePublished - Feb 2000

Fingerprint

unsaturated hydraulic conductivity
Hydraulic conductivity
permeameters
permeameter
hydraulic conductivity
Soil
Soils
ceramics
Ceramics
soil
steady flow
Water
vadose zone
Steady flow
solutes
spatial variation
solute
Sand
water
testing

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)
  • Civil and Structural Engineering
  • Water Science and Technology

Cite this

Measurement of subsurface unsaturated hydraulic conductivity. / Holland, D. F.; Yitayew, Muluneh; Warrick, A. W.

In: Journal of Irrigation and Drainage Engineering, Vol. 126, No. 1, 02.2000, p. 21-27.

Research output: Contribution to journalArticle

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