Unsaturated Hydraulic Conductivity

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The unsaturated hydraulic conductivity of a particular material is challenging, costly and time-consuming to measure in the laboratory. It is therefore common to use empirical methods to estimate the unsaturated hydraulic conductivity of the particular material. SVFLUX implements a number of empirical methods in order to estimate how the hydraulic conductivity of a material changes (decreases) as the soil desaturates. The methods implemented in the software are implemented to the best of our knowledge in accordance with the specifications of the original author. The implementation of each method in SVFLUX does not imply any warranty as to the use or performance of the methods. The user should use their own professional judgment when applying any of these empirical estimation methodologies.


A more comprehensive list of the estimation methods can be found in our SVSOILS database software. The SVSOILS database software also allows the user to compare theoretical estimations with laboratory results collected in the extensive SVSOILS database. For more information on the SVSOILS software please visit our SVSOILS database site.


The following sections provide more details on the implementation of specific methods used in SVFLUX to estimate unsaturated hydraulic conductivity.