For constant capillar pressure function the saturation is
determined by cell depths:
Sg_max, Sw_min
----- goc ----
Sg_min, Sw_min
----- woc ----
Sg_min, Sw_max
For constant capillar pressure function the saturation is
determined by cell depths:
Sg_max, Sw_min
----- goc ----
Sg_min, Sw_min
----- woc ----
Sg_min, Sw_max