André Burnol works in the Risks and Risk Prevention division of the French Geological Survey, BRGM. He is the Head of the Unit "Safety and performance of subsurface uses". His research field concerns the coupling of physical and (bio)geochemical processes controlling the mass transfer between water, gas, and solid phases in porous media. He defended a doctorate in environmental geochemistry at Grenoble University on the mobility of arsenic in the aquifers of the delta of Bengal. His current research field concerns the assimilation of satellite-derived soil moisture in subsurface models.