Unstructured stacked prism Mesh
River 1 meter wide
River buffer 1 meter wide
The River node elevations are interpolated from a center line DEM
Triangulation from .5 to 60 meters away from river

This is a first iteration triangulation using nicely formed polygons.
Improvements on the triangulation will be based on the model results.
Issues to look at:
  Are the river faces oriented correctly for flow?
  Is the river positioned within the topology correctly for flow?
  What is the effect of river 1 cell wide, impact where there are more?

The triangulation can be improved; remove fan effects along parts of the river,
break triangles inside branch intersects, improve smooth transition from small
1 meter cells near river to 60 meter at boundary, improve triangulation along
boundary to avoid ponding or other mesh efects.
See if triangulation of river can be improved to ensure single cells across width.


Title: LAGRIT TO EXODUS                                                         
number of dimension:               3                                            
number of nodes:             1431859                                            
number of elements:          2594200                                            
number of element blocks:          2                                            
number of edge sets:               3                                            
number of side sets:               6                                            

Materials:
1 3 cells .25 thick
2 3 cells .75 thick
2 4 cells 2.0 thick

ExodusII: Done writing to ExodusII file: prism_fs.exo 
Exodus side sets:
  1 bottom            259420 faces
  2 top full          259420 faces
  3 all sides           9160 faces
  4 top river           6815 faces
  5 top river buffer   13634 faces
  6 top not river     238981 faces