Department of Earth Science |Northeastern Illinois University

ESCI 337
Fall, 2007

Daily Objectives #15 (October 18, 2007)                                        Dr. Sanders

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

v Hydrostratigraphy and Flow Systems
  • List the four different kinds of flow system boundaries and sketch cross sections or maps showing examples of each.
v Hydrogeologic Maps and Cross Sections
  • Find borehole data for a given area in Illinois, and use it to delineate flow system boundaries, identify hydrostratigraphic units, and construct hydrogeologic cross sections.

Today's Agenda:

v Hydrostratigraphy and Flow Systems
v Hydrogeologic Maps and Cross Sections (Homework #4!)

(decimal degrees)
00404 -88.16533 39.25964
47782 -88.17356 39.25601
47783 -88.16998 39.25866

Your job is to collect subsurface data and create cross section(s) that portray the geologic setting of these water supply wells.  Your cross section should illustrate the hydrogeologic system--that is, it should have boundaries.  Keep that in mind as you decide how far your cross section should extend. 

The cross section will extend from point to point, not necessarily in a straight line (some call this a "fence diagram".)
Use as many points as you need to represent the system.

On your cross section, show the following:
Draw your cross section IN PENCIL!!!!  (You probably will have to change it after it is reviewed.)

You may find it helpful to use to locate the CWS wells.  Also, check out .

We will be working on this project today and Tuesday.  By the end of the day on Tuesday, you should have delineated the boundaries of the flow system, collected all the boring log data you need, identified the hydrostratigraphic units, and sketched out what you think the final cross section will look like.  You also may wish to get a start on the final drawing. 

Please cooperate with each other to collect data and analyze the problem; each person should hand in his or her own cross section.

Department of Earth Science | Northeastern Illinois University

© 2007 Laura L. Sanders.  Last updated October 18, 2007.