====== Flow Line Geometry ======


Flow line geometry model relies on the hypothesis of plane strain. However, force can be added to account for the lateral friction occurring on the lateral walls of the glacier, ice-stream or ice-shelf. This can be done using the concept of shape factor trough the [[userfunctions:shapefactor|Shape Factor User Function]] or following the lateral drag parametrization proposed in Gagliardini et al. (2010) using the [[userfunctions:lateralfriction|Lateral Friction User Function]].