of Earth Science |Northeastern
Daily Objectives #25 (November
the end of today's class, you should be able to do the
v Work with your group to
standardize the notations and unit names on your cross sections.
v Imagine that the cities of
Itasca and Elk Grove Village decide to collaborate on building a
recreational water park in your study area. They will need lots
of water, so they decide they want to install a well on the property to
supply their needs. They come to you to ask you to evaluate the
situation for them. They want to know 1) how deep the well should
be, 2) at what rate they can safely pump it without causing problems in
the nearby area, 3) what area they should outline for wellhead
protection, and 4) anything else they need to know about installing
Today, you will begin constructing your ground water model for the
A copy of the bitmap image (map) of the study area study
area can be downloaded from this link.
Download and save it.
Start GGW. Click File | Open Graphic Image,
and then open the map.
Set the scale. Click Grid | Set Scale.
Hint: you can use the scale bar at the bottom of the map--but if you
do, put it in units of feet. Click Finished.
Click Grid | Uniform Grid. This shouldn't be
necessary, but I've found it prevents crashing.
A copy of the Excel file used in constructing
the model grid can be downloaded from this link. Download, save,
and open it.
Copy the list of numbers under "column widths".
Go to GGW and click Edit | Paste Column Coordinates.
Go back to Excel and copy the list of numbers under
Go to GGW and click Edit | Paste Row Coordinates.
Check to see that the grid covers the model area.
Click Mode | Go to Model Mode. Save your
work. Now you can start to model!
A file on a step-by-step
approach to building your model appears here.
Click here for a checklist
of parameters you must set for your model.
of Earth Science | Northeastern
© 2005 Laura L.
Last updated November 30, 2005.