Quick Estimation of Hydraulic Conductivity in Unsaturated Sandy Loam Soil |
| |
Authors: | SG Giakoumakis GP Tsakiris |
| |
Institution: | (1) Laboratory of Reclamation Works and Water Resources Management, Department of Rural and Surveying Engineering, National Technical University of Athens 9, 15 780 Athens, Greece |
| |
Abstract: | Laboratory experiments were conductedfor determining hydraulic conductivity duringinfiltration in an unsaturated sandy loam soil, usingboth steady state and equilibrium methods. A constanthead Guelph permeameter and a volumetric pressureplate extractor were used. Based on two ponded heightsin the permeameter, the parameters of Gardner'sequation expressing the unsaturated hydraulicconductivity as a function of pressure head (i.e. thesaturated hydraulic conductivity Ks and theexponent ), were estimated simultaneously.Furthermore, it was found that the parameter ,could also be predicted from the soil-water retentioncurve based on equilibrium data obtained from theextractor. This indicated that, for the soil typestudied, one-ponded height in the permeameter methodcould be sufficient for the determination of theexponent , provided that the soil-water retentioncurve is known. |
| |
Keywords: | hydraulic conductivity Gardner's equation unsaturated soil (vadose zone) |
本文献已被 SpringerLink 等数据库收录! |
|