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Figure 5-7: Example of using the ‘Seepage Area’ option from the ‘Display Input’ drop-down menu to indicate areas
where groundwater is discharging at the land surface.
By default, the land surface is used as the top elevation for computing seepage (in the case where the
hydraulic head is larger than the top elevation). However, an offset can be applied to determine where the
hydraulic head is higher than some distance below the land surface. For example, one might be interested
in knowing where the water table intersects the root zone (about 1 ft. below the surface) across the model
domain.

To apply an offset, check the radio box next to ‘Seep: Elev -’, and enter the
offset amount (units: meters) in the provided text box. The ‘W=’ text box is
used to specify the length (units: pixels, or px) of each cross-hair used to
depict a grid cell in which seepage is occurring.

5.2.4 Exporting to Google Maps/Earth

Checking the radio box next to ‘high resolution image sends back a double-resolution image of current
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model output .
To view the model inputs and simulation results in Google Earth, check
the radio box next to ‘Show on GE’. After the model simulation is
completed, a link, ‘(GE KML)’, will be available in the Default Model Parameters and Options menu. Click
on the link to download the .kml file to be loaded in Google Earth. An example kml file opening in Google
Earth is shown in Figure 5-8.

The value in the text box next to ‘GM Overlay Delay Time:’ is the
delay time (units: milliseconds) to be used for displaying updated
model results in Google Earth.

13 This feature is being phased out of the next version of MAGNET.
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