User's guide of Proceessing Modflow 5.0

Processing Modflow 181
Tool bar
The tool bar provides quick access to commonly used commands in the PMPATH modeling
environment. You click a button on the tool bar once to carry out the action represented by that
button. To change the current layer or the vertical local coordinate, click the corresponding edit
field in the tool bar and type the new value then press ENTER. See eq. 4.7 for the definition of
the vertical local coordinate. The following table summarizes the use of the tool bar buttons of
PMPATH.
Table 4.1 Summary of the tool bar buttons of PMPATH
Button Action
Open model
Open Model; allows a user to open a model created by PMWIN.
Set Particle; allows a user to place particles in the model domain.
Erase Particle; provides a way to delete particles.
Zoom In; allows you to drag a zoom-window over a part of the model.
Zoom Out; Forces PMPATH to display the entire model grid.
Particle color; Allows a user to select a color for new particles from a color dialog box.
Run particles backward; executes backward particle tracking for a time lenght. The time length is
defined by the product of the number of particle tracking steps and the particle tracking step length.
Run particles backward step by step; executes backward particle tracking for a user-specified
particle tracking step length.
Stop; stops the particle tracking or stops drawing particles.
Run particles forward step by step; executes backward particle tracking for a user-specified particle
tracking step length.
Run particles forward; executes forward particle tracking for a time length. The time length is defined
by the product of the number of particle tracking steps and the particle tracking step length.
Opens an existing model created by PMWIN. A PMWIN-model file always has the extension
PM5. Prior to openning a model, the flow simulation must be performed. By default, PMPATH
reads the unformatted (binary) files (HEADS.DAT and BUDGET.DAT) from the same folder
as the loaded model.
Set particle
Use the following two methods to place particles in the current layer. The current layer is shown
in the tool bar (Fig. 4.5). Change it first, if you need to place particles into another layer. Note
that particles cannot be placed in inactive cells or fixed-head cells (constant head cells).
4.2 PMPATH Modeling Environment