Catchment‐Scale Architecture of the Deep Critical Zone Revealed by Seismic Imaging

Weathering and erosion processes are crucial to Critical Zone (CZ) evolution, landscape formation availability of natural resources. Although many these take place in the deep CZ (∼10–100 m), direct information about its architecture remain scarce. Near-surface geophysics offers a cost-effective minimally intrusive alternative drilling that provides physical properties CZ. We propose novel workflow combining seismic measurements, petrophysical modelling geostatistical analysis characterize at catchment scale, on volcanic tropical island Basse-Terre (Guadeloupe, France). With this original workflow, we for first time able jointly produce maps water table weathering front across an entire catchment, by means single geophysical method. This integrated view highlights complex patterns call going beyond “simple” hillslope models.