Department of Earth Science |Northeastern Illinois University

ESCI 337
Fall, 2007

Daily Objectives #9 (September 25, 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. 
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 hydraulic head has on the flow of water.

Today's Agenda:

v Reminder: Exam #1 is on Oct. 4 (one week from Thursday).

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.

v Measuring Hydraulic Conductivity and Permeability:  In new groups (see Homework #3), devise a new protocol for measuring hydraulic conductivity.  Using that protocol, measure the hydraulic conductivity of three samples of sediments, and write a lab report as per the instructions  given on the homework page.
Department of Earth Science | Northeastern Illinois University

© 2007 Laura L. Sanders.  Last updated September 25, 2007.