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Chapter 5 SIMULATION AND VISUALIZATION

As described in Chapter 1, MAGNET is designed so that any model can be simulated with results provided
in “real-time” (i.e., nearly instantaneously if a modest number of grid cells and conceptual features are
used). The results can be used to guide model editing or to build new, nested models for more detailed local
analysis (see subsection 3.6.1). This chapter explains how to simulate and run a model and view the model
results.

5.1 Submitting a Model for Simulation

Once the model domain has been created, a user may submit the model (or “job”) for
simulation by clicking on the red ‘SIMULATE’ button on the left-side of the MDWA
(see section 2.4). The first time a job is submitted, the user must provide their account credentials, i.e.,
username and password (see Section 1.3). All subsequent job submissions during the web session will not
require entering user credentials.
Note that users need not change any default inputs/options or add any conceptual features in order to run a
model. This “one-click” steady-state modeling approach allows users to quickly see the large-scale,
prevailing flow patterns that are largely controlled by the topographic framework (see Curtis et al., in
preparation), which is by default set as the top aquifer elevation surface (see subsection 3.3.1).

Once the model has been submitted for simulation,
MAGNET will automatically search for the appropriate
geographic projection (‘PRJ’) to use based on the region
used for modeling. A prompt will appear asking the user
to accept the projection (LM click the ‘OK’ button) or use
the default projection (click the ‘Cancel’ button). See the
following sub-section for details on defining the default
projection.

5.1.1 Defining the Default Projection System

To define a default projection system to use for modeling, navigate to the Default Parameters and Options
menu by LM clicking on the ‘DefaultInput’ button along the left-side of the MAGNET Modeling
Environment (see Section 2.7). LM click the ‘Browse’ button next to ‘Load PRJ’ in the Projection option
box (see Figure 5-1). This will open a window to browse to a file for uploading. After the projection system
file is loaded, the system details will be shown in the large text window below the name of the current
11
default projection system .

11 By default, the NAD_1983_NSRS2007_Michigan_GeoRef_Meters (State of Michigan) projection system is used
in MAGNET.
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