Assessment of the interactions between soil–biosphere–atmosphere (ISBA) land surface model soil hydrology, using four closed-form soil water relationships and several lysimeters

نویسندگان

چکیده

Abstract. Soil water drainage is the main source of groundwater recharge and river flow. It therefore a key process for resource management. In this study, we evaluate soil hydrology drainage, simulated by interactions between soil–biosphere–atmosphere (ISBA) land surface model currently used hydrological applications from watershed scale to global scale, where parameters are generally not calibrated. This evaluation done using seven lysimeters two long-term approach sites measuring hourly dynamics 2009 2019 in northeastern France. These 2 m depth filled with different types either maintained as bare or covered vegetation. Four closed-form equations describing retention hydraulic conductivity functions tested, namely commonly Brooks Corey (1966) van Genuchten (1980), combination (1980) function unsaturated function, and, very first time (LSM), modified version equations, new curve proposed Iden et al. (2015). The results indicate good performance ISBA closure terms volumetric content mass. drained flow at bottom lysimeter well simulated, (1966), while some weaknesses appear due abrupt shape near saturation its function. mixed form (2015) allows solving problem even improves simulation dynamic, especially intense events. study also highlights importance vertical heterogeneity hydrodynamic correctly simulate addition primary influence characterizing

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ژورنال

عنوان ژورنال: Hydrology and Earth System Sciences

سال: 2023

ISSN: ['1607-7938', '1027-5606']

DOI: https://doi.org/10.5194/hess-27-2437-2023