Vulnerability mapping of groundwater contamination based on 3D lithostratigraphical models of porous aquifers

► We developed a 3D model to reconstruct a lithostratigraphy of an alluvial aquifer. ► We used the 3D model in the assessment of aquifer contamination vulnerability. ► The DRASTIC, SINTACS and AVI methods have been applied to the alluvial aquifer. ► SINTACS is more severe than DRASTIC and AVI is much more severe of both. ► The 3D models avoid the “bullseye” effect linked to the data point values.