User's guide of Proceessing Modflow 5.0

Processing Modflow 33
2. Click OK to close the dialog box.
Fig. 2.22 The Advection Package (MTADV1) dialog box
< To assign the dispersion parameters
1. Choose MT3D < Dispersion... from the Models menu.
A Dispersion Package (MT3D) dialog box appears. Enter the ratios of the transverse
dispersivity to longitudinal dispersivity as shown in Fig. 2.23.
2. Click OK.
PMWIN displays the model grid. At this point you need to specify the longitudinal
dispersivity to each cell of the grid.
3. Choose Reset Matrix... from the Value menu (or press Ctrl+R), type 10 in the dialog box
then click OK.
4. Turn on layer copy by clicking the layer copy button .
5. Move to the second layer and the third layer by pressing PgDn twice.
The cell values of the first layer are copied to the second and third layers.
6. Choose Leave Editor from the File menu or click the leave editor button .
< To assign the chemical reaction parameters
1. Choose MT3D < Chemical Reaction < Layer by Layer from the Models menu.
A Chemical Reaction Package (MTRCT1) dialog box appears. Clear the check box
Simulate the radioactive decay or biodegradation and select Linear equlibrium
2.2.1 Perform Transport Simulation with MT3D