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Measuring unsaturated hydraulic conductivity (K(ψm)) of the F and H soil organic layers at small matric potential (ψm)

Author:
Wilske, B., Johnson, E. A.
Source:
Canadian journal of plant science 2011 v.91 no.6 pp. 965-968
ISSN:
1918-1833
Subject:
databases, forests, methodology, organic horizons, unsaturated hydraulic conductivity
Abstract:
Wilske, B. and Johnson, E. A. 2011. Measuring unsaturated hydraulic conductivity (K(ψₘ)) of the F and H soil organic layers at small matric potential (ψₘ). Can. J. Soil Sci. 91: 965–968. K(ψₘ) of the soil organic layers is a key parameter to assess water redistribution in cold-climate forests. This study tested the twin suction disc apparatus (TSD) as a new method to measure K(ψₘ) of the F and H layers directly. We compared the results to two studies. One represents a large data base, the other used similar sample locations; but both derived K(ψₘ) from combining two methods, i.e., pressure plate measurements combined with the instantaneous profile technique or the constant head approach. The TSD data are consistent with previous results considering the large variability in K(ψₘ) from the combined methods. This suggests that the TSD method represents an alternative to determine K(ψₘ) of the soil organic layer.
Agid:
5171801