Assessing water and energy fluxes in a regional hydrosystem: case study of the Seine basin

作者：D. Kılıç, A. Rivière, N. Gallois, A. Ducharne, Shuaitao Wang, P. Peylin, N. Flipo · 发表于：Comptes rendus Geoscience · 年份：2022 · DOI：10.5802/crgeos.165 · 被引用次数：4

. While it is well accepted that climate change and growing water needs a ff ect long-term sustainable water resources management, performing accurate simulations of water cycle and energy balance dynamics at regional scale remains a challenging task. Traditional Soil-Vegetation-Atmosphere-Transfer (SVAT) models are used for numerical surface waterandenergysimulations.Thesemodels,byconception,donotaccountforthegroundwaterlower boundarythatpermitsafullhydrosystemrepresentation.Conversely,whileaddressingimportantfea-tures such as subsurface heterogeneity and river–aquifer exchanges, groundwater models often integrate overly simplified upper boundary conditions ignoring soil heating and the impacts of vegetation processes on radiation fluxes and root-zone uptakes. In this paper, one of the first attempts to jointly model water and energy fluxes with a special focus on both surface and groundwater at the regional scale is proposed on the Seine hydrosystem (78,650 km 2 ), which overlays one of the main multi-aquifer systems of Europe. This study couples the SVAT model ORCHIDEE and the process-based hydrological– hydrogeological model CaWaQS, which describes water fluxes, via a one-way coupling approach from ORCHIDEE toward CaWaQS based on the blueprint published by de Marsily et al. [1978]. An original transport library based on the resolution of the di ff usion/advection transport equation was developed in order to simulate heat transfer in both 1D-river networks and pseudo-3D aq...