GGU-RETAIN: "Groundwater" menu item

With regard to the horizontal water pressure approach, please refer to the explanations in
”Theoretical principles: Water”.

For homogeneous conditions, the "Toe potential to EAU 2004 R 115" check box can also be activated.

If the base of the sheet pile does not correspond to the base of the actual percolation (e.g. combined sheet pile wall with infill sheets not driven to the depth of the king pile), a depth may be defined for the base of the percolation below the toe after activating the check box "Adopt flow below wall base".