FIELD METHODS FOR DETERMINING UNSATURATED HYDRAULIC CONDUCTIVITY.

Muluneh Yitayew, J. Watson

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

1 Citation (Scopus)

Abstract

Mathematical models have been developed which describe soil water movement under point and disc sources. Results of these models suggest the possibility of estimating unsaturated hydraulic conductivity if the variables K//o and alpha in the exponential function K( psi ) equals K//o exp( alpha psi ) are evaluated. Two approaches to evaluate these parameters in the field are proposed. Method 1 involves application of a constant flux from a simple constant flow device and measuring the steady state wetted radius for two different values of flux, and Method 2 makes use of a sorptivity tube type device - with a given potential at the soil surface and measurement of the steady flow rate and wetted radii. These measurements allow for the algebraic solution of the hydraulic conductivity function.

Original languageEnglish (US)
Title of host publicationPaper - American Society of Agricultural Engineers
PublisherASAE
StatePublished - 1986

Fingerprint

unsaturated hydraulic conductivity
Soil
Water Movements
soil water movement
steady flow
Equipment and Supplies
hydraulic conductivity
Theoretical Models
mathematical models
methodology
soil

ASJC Scopus subject areas

  • Agricultural and Biological Sciences (miscellaneous)

Cite this

Yitayew, M., & Watson, J. (1986). FIELD METHODS FOR DETERMINING UNSATURATED HYDRAULIC CONDUCTIVITY. In Paper - American Society of Agricultural Engineers ASAE.

FIELD METHODS FOR DETERMINING UNSATURATED HYDRAULIC CONDUCTIVITY. / Yitayew, Muluneh; Watson, J.

Paper - American Society of Agricultural Engineers. ASAE, 1986.

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

Yitayew, M & Watson, J 1986, FIELD METHODS FOR DETERMINING UNSATURATED HYDRAULIC CONDUCTIVITY. in Paper - American Society of Agricultural Engineers. ASAE.
Yitayew M, Watson J. FIELD METHODS FOR DETERMINING UNSATURATED HYDRAULIC CONDUCTIVITY. In Paper - American Society of Agricultural Engineers. ASAE. 1986
Yitayew, Muluneh ; Watson, J. / FIELD METHODS FOR DETERMINING UNSATURATED HYDRAULIC CONDUCTIVITY. Paper - American Society of Agricultural Engineers. ASAE, 1986.
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