Investigation of numerical and analytical solutions of 1D steady and transient flow in unsaturated layered soils
Chetti, Ahmed (University Center of El-Bayadh)
Trouzine, Habib (Djillali Liabes University of Sidi Bel Abbes)
Korichi, Khaled (Djillali Liabes University of Sidi Bel Abbes)
Hakmi, Mohammed Amin (University Center of El-Bayadh)

Data:	2024
Resum:	This study presents a comprehensive numerical simulation and analytical modeling of steady and transient flow in heterogeneously saturated soils. Solving the Richards equation involves challenges due to the nonlinearity between the pressure and the water content. Two constitutive models are used to describe the complex relationships between moisture content, hydraulic head, and hydraulic conductivity namely, Gardner model and Van Genuchten-Mualem model. Through detailed simulations, four configurations are investigated, including the capillary barrier effect, bi-layered soil dynamics in paddy fields, and infiltration in multi-layered soil in both saturated and unsaturated steady-state regimes. The comparison between numerical results and the established analytical model shows a good agreement. It underscores the usefulness of the model to reproduce saturated and unsaturated seepage flow in bi-layered and multi-layered soils. Moreover, it captures the dynamic interactions between infiltration and evaporation during the transient phase. These findings offer insights for water resource management, land subsidence mitigation, and environmental sustainability.
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, sempre i quan aquestes es distribueixin sota la mateixa llicència que regula l'obra original i es reconegui l'autoria.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Numerical ; Analytical ; Steady ; Transient ; Unsaturated ; Layered soil
Publicat a:	Geologica acta, Vol. 22 (2024) , p. 1-12 (Articles) , ISSN 1696-5728

Adreça original: https://revistes.ub.edu/index.php/GEOACTA/article/view/46073
Adreça alternativa: https://raco.cat/index.php/GeologicaActa/article/view/433375
DOI: 10.1344/GeologicaActa2024.22.8

12 p, 1.7 MB

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