Views:

Question 
Why do my results look wrong in my discrete point output when I use a sigma-z level grid in a MIKE 3 simulation?

Answer 
The layer number selected for discrete values in the point output is defined from the lowest active layer (=1) increasing upwards.  See example in Fig. 1. In case the mesh is a type of sigma mesh, the number of active layers in the water column will always be the same in any point of the domain. In case the mesh is a combined sigma-z level mesh the number of active layers may vary in the domain.

Fig. 1 - Layer number selected for discrete values in the point output is defined from the lowest active layer (=1) increasing upwards. 

Further information
User Guide. MIKE 3 Flow Model FM. Hydrodynamic Module