AEM imagery down to one kilometer depth: New constraints for geological and hydrogeological modeling in volcanic contexts

We present the integration of airborne magnetic data and five different airborne electromagnetics data sets spaning from 3 000 NIA up to 1 000 000 NIA magnetic moments (three different AEM systems were used) in La Reunion volcanic island. Subsequently, a 3D geological model of the first kilometer beneath the Plaine des Fougeres was built, in order to constrain 3D hydrogeological modeling. This approach allowed for the correlation of different datasets, providing a comprehensive image of the subsurface and enabling a greater hydrogeological understanding. It was used to position the route of a deep water drainage gallery and has great potential for applications in other areas.