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start_define
eps_geometry 1.e-1
end_define
start_define
left_edge geometry_line 10
end_define
left_edge 0 0 55 30 eps_geometry
start_define
right_dry_edge geometry_line 20
end_define
right_dry_edge 135 20 120 30 eps_geometry
We define geometrical lines where later the water boundary conditions will be applied.