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of variables shown in Figure 5-16. A legend is automatically generated based on the color map variable
chosen. Table 5-2 shows the units used for each model variable available for display in the 3D Surface
Plot.

Figure 5-16: Model variables available for display in the 3D Surface Plot.

Table 5-2: Units of model variables displayed in the 3D Surface Plot.
Variable Units
Top Elevation m
Bottom Elevation m
Aquifer Thickness m
Head m
Concentration ppm
Velocity X, Y, Z m/d
Conductivity m/d
2
Transmissivity m /d

Use the text boxes next to ‘Rotation X:’, ‘Y:’, and ‘Z:’ to rotate the display about the X- (W-E), Y- (N-S)
and Z- (vertical) axes. To adjust the vertical exaggeration factor, check the radio box next to ‘Use Zscale’,
and enter the factor in the provided text-box.

Check the ‘Log Scale’ radio box to display the model variable as log(variable), e.g., when displaying
conductivity or transmissivity, which can vary many several orders of magnitude. Check the ‘Large Plot’
radio box to enlarge the chart display. By checking the ‘Show Elev Extension’ radio box, the extents of
different geological/conceptual layers (Premium Version Only) will be showed along the sides of the 3D
head distribution.
After making all desired changed, click on the ‘ReDraw’ button to update the 3D Surface plot.

5.6 Particle Tracking

A useful way to visualize groundwater flow is to perform traditional particle tracking, in which particles
undergoing only advection are introduced at various locations in the flow model, and path lines and travel times are
simulated and visualized. Particle tracking allows delineation of path lines in a flow model, which be used,
e.g., to determine well capture zones, source water areas, and groundwater delivery mechanisms.

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