Because the MODFLOW-96 input data do not always contain layer top and bottom elevations, an extra text file is needed to supply these data for Model Viewer. This file is known as the layer elevation file and must contain the following information.
Item 1 -- Confining Bed Codes. One number for each model layer. Free format.
Item 2 -- Elevation of top of layer 1 (top layer). Use MODFLOW 2D array reader format.
Item 3 and onward (for each layer or quasi-3D confining layer) -- Elevation of bottom of
layer or quasi-3D confining layer. Use MODFLOW 2D array reader format.
For example, if the model grid has 5 layers, and layers 1 and 3 have quasi-3D confining layers, then the layer elevation file might look like the following (words after the # symbol on the right are explanations and not part of the file):
Note that the "open/close" method may be used only if the file is not listed in the name file. If a file is listed in the "name" file, then use the "external" method and specify the same unit number as that in the "name" file.