Department of Earth Science |Northeastern Illinois University

ESCI 337
Fall, 2007

Daily Objectives #18 (October 30, 2007)                                        Dr. Sanders

See the instructions for Homework #5 at the bottom of this page!

By the end of today's class, you should be able to do the following:
v Ground Water Modeling: Conceptual Model
  • List and describe the components of a conceptual model, the first part of constructing a ground water model.
  • For a specific study site, identify and characterize each component of a conceptual model.
v Ground Water Modeling: Numerical Model
  • Explain the difference between a conceptual model and a numerical model.
  • Explain the purpose of a numerical model grid.
  • Explain how Darcy's law is used in a numerical model
v Ground Water Modeling: Practice
  • Describe the steps in constructing a model, as given on pages 526-527 of the Fetter textbook.
  • Download and install the modeling program Graphic Groundwater, authored by Dr. Steven Esling at SUI/Carbondale. 
  • Run Graphic Groundwater for a given study site.

Today's Agenda:

v Ground Water Modeling: Conceptual Models
v Ground Water Modeling: Numerical Models

As an individual
Working with others For further thought

v Ground Water Modeling: Practice
Please note: Some of the GGW links work only in Internet Explorer, and not in Netscape.  The opposite may be true for some of the ESCI 337 course pages, which I compose in Netscape.  As a general rule, if you are having trouble with a link, try opening the page in a different browser.

You may wish to examine the files below as a sample of a GGW model.  To get each file, double click on the link and select "Save File", then save each file in a place where you can find it again.  If that doesn't work, then just right click on the link on this page and select "Save Link Target As".  Remember where you save it to, so you can find it again!

(1) GGW Model for the Holiday Hills Community (file extension ".ggw")     

(2) Map Image for Holiday Hills (file extension ".bmp")

(3) Grid for this model (extension .xls) (you don't need this one to run the model, but you might want to look at it for your own information)

Homework for Thursday, November 1: 

1) Write a 1-2 paragraph description of the geology of the study area.  (Refer to the cross section.) 
2) Write a 2-3 paragraph description of the conceptual model, including at this point, the hydrostratigraphy and the boundaries to the flow system (we will add the other components next time).

Want some serious fun?  Get a sneak preview of the instructions for making a grid and constructing your own model.  Download and read these two documents:
  First Steps and   Building Your Model    A graphic image of our study area is posted here!

Department of Earth Science | Northeastern Illinois University

© 2007 Laura L. Sanders.  Last updated October 30, 2007.