Department of Earth Science |Northeastern Illinois University

PRINCIPLES OF HYDROGEOLOGY
ESCI 337
Spring, 2004

Daily Objectives #11 (February 19, 2004)                                             Dr. Sanders

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

v  Explain the meaning of the terms hydraulic conductivity and permeability, and explain the difference between the two.

v  Give typical ranges of the value of hydraulic conductivity and permeability of different types of porous materials, using the correct units of measurement.

v  List the kinds of rocks and sediments that are generally considered aquifers, and those that are generally considered aquitards.

v  Sketch a cross section illustrating the generalized hydrostratigraphy of northeastern Illinois. 

v  Sketch the Darcy tube apparatus and describe how it works.

v  Use your knowledge of hydraulic properties to solve three practical problems:

q  We will need to add water to saturate the sediments in the Darcy tube.  When we're done with the experiments, we will need to drain it before putting it away.  Estimate how much water will be needed to fill the Darcy tube.  Then, estimate how much water will drain out.

q  Figure out how much water was lost from an aquifer during a drought (Chapter 3, Problem #9, on p. 111).

q  Look at the map in the Willman (1971) ISGS circular ("Summary of the Geology of the Chicago Area").  Based on the information in the map/document, decide where in the Chicago area people could find abundant ground water that they could tap with shallow wells.  Then, combining this information with the information on the map of the bedrock geology of Illinois, identify areas that are likely to have abundant ground water that can be tapped with deeper wells--wells that extend into the bedrock.  (On the NEIU campus, to find abundant ground water, would we need to drill shallow wells?  Or deep wells?)

v  Discuss your team's consensus on how to use the "Team Member Evaluation Form", and explain how the "Peer Rating of Team Members" form will be used.

Don't forget!  A group report on the permeameter lab work is due next week as the first part of Homework Assignment #4.  Please also note that there is a second part to the assignment, as well!
Department of Earth Science | Northeastern Illinois University

© 2004 Laura L. Sanders.  Last updated February 19, 2004.