Department of Earth Science | Northeastern Illinois University

Principles of Hydrogeology
Earth Science 337
Spring 2002

Daily Objectives #16                                                                                         Dr. Sanders
(March 5, 2002)

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

* Explain what the "water table" is in terms of saturation conditions as well as in terms of hydraulic head.

* Explain what a potentiometric surface is, and tell what the difference is between the water table and the potentiometric surface.

* Sketch a flow net  for a simple flow system.

* Draw a quantitatively accurate flow net showing
        > the correct relationship between equipotential lines and flow lines,
        > the correct relationship between those lines and constant head boundaries,
        > the correct relationship between those lines and no-flow boundaries, and
        > the correct relationship between those lines and a water table boundary.

* Use a flow net to tell the direction of ground water flow and identify areas of high and low gradients.

* Use a flow net to estimate velocity of flow and discharge through an aquifer.

Updated February 28, 2002.