2026-10-29T21:48:59Zhttps://munzur-rdlopen.rawdatalibrary.net/oai/requestoai:munzur-rdlopen.rawdatalibrary.net:munzur/30422026-10-28T15:28:00Zopenairedrivercom_munzur_1col_munzur_2com_munzur_8col_munzur_154Mixed formulation for an easy and robust numerical computation of sorptivityLassabatere, LaurentPeyneau, Pierre-EmmanuelYilmaz, DenizPollacco, JosephFernández-Gálvez, JesúsLatorre, BorjaMoret-Fernández, DavidDi Prima, SimoneRahmati, MehdiStewart, Ryan D.Abou Najm, MajdiHammecker, ClaudeAngulo-Jaramillo, RafaelSorptivity is one of the most important parameters for the quantification of water infiltration into soils. proposed a specific formulation to derive sorptivity as a function of the soil water retention and hydraulic conductivity functions, as well as initial and final soil water contents. However, this formulation requires the integration of a function involving hydraulic diffusivity, which may be undefined or present numerical difficulties that cause numerical misestimations. In this study, we propose a mixed formulation that scales sorptivity and splits the integrals into two parts: the first term involves the scaled degree of saturation, while the second involves the scaled water pressure head. The new mixed formulation is shown to be robust and well-suited to any type of hydraulic function - even with infinite hydraulic diffusivity or positive air-entry water pressure heads - and any boundary condition, including infinite initial water pressure head, h→-∞. Lastly, we show the benefits of using the proposed formulation for modeling water into soil with analytical models that use sorptivity. Copyright:Copernicus Publications2023Articlehttps://rdlopen.rawdatalibrary.net/r/munzur/3042https://doi.org/10.5194/hess-27-895-20231027-5606enHydrology and Earth System Sciencesinfo:eu-repo/semantics/openAccessinfo:eu-repo/semantics/articlehttps://munzur-rdlopen.rawdatalibrary.net/tr/items/munzur/3042