A general Beerkan Estimation of Soil Transfer parameters method predicting hydraulic parameters of any unimodal water retention and hydraulic conductivity curves: Application to the Kosugi soil hydraulic model without using particle size distribution data

J. Fernández-Gálvez 1, 2 J. Pollacco 2 L. Lassabatère 3 R. Angulo-Jaramillo 3 S. Carrick 2
1 Department of Regional Geographic Analysis and Physical Geography
2 Manaaki Whenua Landcare Research
3 LEHNA - Laboratoire d'Ecologie des Hydrosystèmes Naturels et Anthropisés
Abstract : Soil hydraulic characterization is crucial to describe the retention and transport of water in soil, but current methodologies limit its spatial applicability. This paper presents a cost-effective general Beerkan Estimation of Soil Transfer parameters (BEST) methodology using single ring infiltration experiments to derive soil hydraulic parameters for any unimodal water retention and hydraulic conductivity functions. The proposed method relies on the BEST approach. The novelty lies in the use of Kosugi hydraulic parameters without need for textural in- formation. In addition, the method uses a quasi-exact formulation that is valid for all times, which avoids the use of approximate expansions and related inaccuracy. The new BEST methods were tested against numerically generated data for several contrasting synthetic soils, and the results show that these methods provide consis- tent hydraulic functions close to the target functions. The new BEST method is accurate and can use any water retention and hydraulic conductivity functions.
Keywords : Soil hydraulic properties Single ring infiltration experiments BEST (Beerkan Estimation of Soil Transfer parameters) Kosugi hydraulic parameters van Genuchten hydraulic parameters Quasi-exact implicit formulation
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Journal articles
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Submitted on : Tuesday, May 28, 2019 - 9:33:05 AM
Last modification on : Thursday, February 20, 2020 - 7:23:21 PM

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J. Fernández-Gálvez, J. Pollacco, L. Lassabatère, R. Angulo-Jaramillo, S. Carrick. A general Beerkan Estimation of Soil Transfer parameters method predicting hydraulic parameters of any unimodal water retention and hydraulic conductivity curves: Application to the Kosugi soil hydraulic model without using particle size distribution data. Advances in Water Resources, Elsevier, 2019, 129, pp.118-130. ⟨10.1016/j.advwatres.2019.05.005⟩. ⟨hal-02141648⟩

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