Import GeoVolume From XML
From ArcHydroGW Wiki
Import GeoVolume from XML tool imports 3D volume features as 3D multipatches into the GeoVolume feature class. The tool input is an XML file where volumes are defined as a set of 3D triangles, each composed of three 3D vertices.
The 3D volumes represent 3D hydrogeologic units and can be viewed in ArcScene
