In the vertical model, the X coordinate describes the position on the section line. The Y coordinate describes the position height. The specification of an areal groundwater recharge (attribute FLAE) makes no sense with this model type; the attributes RAND or RANX are used instead. The thickness (MAEC) describes the depth perpendicular to the vertical mesh.

The two figures below show how the coordinate systems are defined in reality (left) and in SPRING in the vertical model (right):

Coordinate system in reality (left) and in the vertical model in SPRING (right)

Creating a 2D vertical model from an existing 3D model