River Corridor Model Constrained by Time‐Lapse Seismic Acquisition

A new hydrogeophysical approach was developed to reveal the spatial and temporal dynamic flow pathways inside a river corridor as well pattern of transient surface water groundwater (SW-GW) exchanges. Obtaining such information from traditional hydrological data remains challenge, both in terms accuracy validation. As there is no direct measurement these fluxes, estimating SW-GW exchanges frequently tackled with help numerical models. Yet, definition initial boundary conditions generally based on poorly constrained assumptions restrained location piezometers, due lack knowledge table (WT) geometry. We provide methodology build stronger constraints simulation hydrodynamic parameters calibration, space time, by using multi-method approach. On Orgeval Critical Zone observatory (France), we show how thorough interpretation high-resolution geophysical images, combined geotechnical data, helps resolve subsurface structural heterogeneity. This coupling provides detailed distribution hydrofacies, valuable prior about associated properties distribution. The WT can be locally captured time-lapse seismic acquisitions. Time-lapse variations are interpreted changes saturated-unsaturated zone continuum. Each snapshot then thoroughly inverted image variations. posterior used calibrate hydrogeological modeling domain. use improves estimation stream-aquifer exchanges, especially during rain event.