Department of Earth Science |Northeastern Illinois University

ESCI 337
Fall, 2007

Daily Objectives #8 (September 20, 2007)                                        Dr. Sanders

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

v Water Flow and Water Table
  • Describe in words what makes water flow. 
  • Define "water table", "saturated zone", and "vadose zone" using the concept of atmospheric pressure, and including the capillary fringe in your discussion.
v Properties of Porous Materials
  • Define the following terms, using appropriate units of measurement: hydraulic conductivity and permeability
  • Characterize rocks and sediments in terms of their hydraulic conductivity and permeability, giving typical ranges of values of these properties for each type of rock and sediment.
  • Explain the difference between hydraulic conductivity and permeability.
v Hydraulic Head
  • Define the term hydraulic head and describe its two components.
  • Explain the effect that hydraulic head has on the flow of water.

Today's Agenda:

Water Table:  Discuss the meaning of the terms "water table", unsaturated (vadose) zone, saturated (phreatic) zone, and capillary zone (capillary fringe), explaining how they relate to atmospheric pressure and pressure of water in the pores.

Homework #2:  Present your work.

Present the results of your investigations into the question assigned to you for Homework #2.

v Hydraulic Head: Discuss what makes water flow and how that relates to the concept of hydraulic head.  Determine the hydraulic head at various points in a cross section illustrating a shallow ground water system.   (Click here to get the worksheet.)

v Water Flow--Lab Explorations, continued:

Debrief the "Darcy Discovery" exploration we did last time.

Properties of Porous Materials: Define these properties of porous materials: hydraulic conductivity and permeability.   Explain the difference between them.  Write formulas to express each quantity.  Give a typical range of values for each property in various rocks and sediments.
Department of Earth Science | Northeastern Illinois University

© 2007 Laura L. Sanders.  Last updated September 20, 2007.