When importing data from a model, a new 2-D data set is created for each active layer in the model and an object is created with a vertex at the center of each active cell in the layer. The formula for the object assigns values to the data set using values read from the data file. A 3-D data set is also created and its formula makes reference to the 2-D data sets to assign values to each cell. In nonsimulated layers, the flow data sets are always assigned a value of zero whereas the head and drawdown data sets are assigned the average of the head in the layer above and below. However, no reliance should be placed on the values assigned in nonsimulated layers. If a value in a nonsimulated layer is important, the layer should be converted to a simulated layer and the modified model should be run again.
If a cell is inactive or goes dry and HNOFLO and HDRY are outside the range of values calculated by the model, the inactive and dry cells will not be colored.
There is no permanent connection between the data file and the object so the values of the data set do not change if the user changes the model and reruns it. It is possible to update the existing data sets by importing the model results again.
The names of the data sets for individual layers are based in the type of data, they contain, and the stress period, time step and layer they represent. For example the name of the data set for the heads in stress period 1 time step 2, layer 3 would be Head_P1_S2_L3. If a data set by that name already exists, the user is prompted to either update the data it contains or to create a new data set. If the user chooses to create a new data set, an underscore character followed by a number is added to the data set name to create a new data set name. The names of data sets that apply to the whole grid rather than to individual layers are named in a similar fashion except that no layer is indicated in the name. For example, the name of the data set for head in stress period 1 time step 2 would be Head_P1_S2. The data sets for model results are classified under "Optional|Model Results."
When importing head data, a 2D water table data set will be created. It records the head in the highest active layer at any particular row and column.
By default, new data sets will be classified under "Optional|Model Results." However, the user may select to classify the results under "User Defined" instead or may type a new classification under which the data should be classified. The new classification would be a subgroup under "Optional."
If the user chooses to classify the new data sets under something other than "Model Results," the user may also specify a prefix that will be included in the name of any new data sets.
The objects used to assign values to the layer data sets are set up to assign values to intersected cells. However, if the grid is changed, this may no longer be appropriate and the user may find it advantageous to change them so that they assign values to cells by interpolation.
The comment assigned to imported data sets will include the stress period, the time step, the elapsed time, and the minimum and maximum values. If the first stress period in the model is a steady state stress period and there is more than one stress period in the model, the elapsed time is measured from the end of the first stress period. Otherwise, the elapsed time is measured from the beginning of the model.
In the cell-by-cell flow file, positive values of flow through the right, front, and lower cell faces represent flows toward higher column, row, or layer numbers.
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