Long-term assessment of water and heat stream-aquifer exchanges in Avenelles Critical Zone Observatory, France (2013-2020)
Résumé
Accurately quantifying surface-subsurface water and energy fluxes is challenging because of a myriad of morphological and physical factors subject to spatial and temporal variability. In this scope, we present here a new understanding of the stream-aquifer interface functioning, shifting from a pure hydrological characterization towards an approach that accounts for hydrology and thermal processes based on a combination of field methods and modelling tools. Four stream- aquifer Local Monitoring Stations (SA-LoMoS) have been deployed along the hydraulic corridor of the Avenelles Critical Zone Observatory (CZO) to monitor the pressure and the temperature in the stream, the hyporheic zone and the underlying aquifer. The numerical quantification of water and heat fluxes provided a new lighting of the stream-aquifer interactions of the Avenelles CZO through six complete annual cycle