Articles | Volume 26, issue 22
Hydrol. Earth Syst. Sci., 26, 5849–5858, 2022
https://doi.org/10.5194/hess-26-5849-2022
Hydrol. Earth Syst. Sci., 26, 5849–5858, 2022
https://doi.org/10.5194/hess-26-5849-2022
Technical note
21 Nov 2022
Technical note | 21 Nov 2022

Technical note: A sigmoidal soil water retention curve without asymptote that is robust when dry-range data are unreliable

Gerrit Huibert de Rooij

Model code and software

Fitting the parameters of the RIA parameterization of the soil water retention curve (1.0) G. de Rooij https://doi.org/10.5281/zenodo.6491979

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Short summary
The way soils capture infiltrating water affects crops and natural vegetation as well as groundwater recharge. This retention of soil water is captured by a mathematical function that covers all water contents from very dry to water-saturated. Unfortunately, data in the dry range are often absent or unreliable. I modified an earlier function to be more robust in the absence of dry-range data, and present a computer program to estimate the parameters of the new function.