Department of Earth Science |Northeastern Illinois University

ESCI 337
Fall, 2005

Daily Objectives #25 (November 30, 2005)                                        Dr. Sanders

By the end of today's class, you should be able to do the following:

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 this well.

Today, you will begin constructing your ground water model for the study area.

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 "Row Heights".
    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.

Department of Earth Science | Northeastern Illinois University

© 2005 Laura L. Sanders.  Last updated November 30, 2005.