Department of Earth Science |Northeastern Illinois University

ESCI 337
Fall, 2005

Daily Objectives #13 (October 17, 2005)                                        Dr. Sanders

Homework #4 (on lab tests of hydraulic properties) is due at the beginning of class.  One per group!

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

v  Use the Darcy tube to investigate the variables in Darcy's Law.   Perform tests by filling the tube with sediment, saturating it, setting the orientation of the tube, allowing water to flow into the tube using the constant head funnel, measuring the discharge during the test, and monitoring gradient during the test by using the piezometers.  Try to fit the data to Darcy's Law to determine the hydraulic conductivity of the sediment.  Alter the variables and run more tests; determine if Darcy's Law still holds true.

v  Explain the meaning of the terms piezometer, hydraulic gradient, hydraulic conductivity, cross-sectional area, aquifer, aquitard, hydraulic head, constant head, discharge.

  Use the ground water flow model to investigate a flow system.  Use dye to reveal the flow paths (each student should inject some dye--use red, green, and blue).  Use the piezometers on the back side of the model to determine hydraulic heads at as many locations as possible. 

v  Determine how you would find flow paths, find hydraulic gradients, and estimate travel times if you had only data from the piezometers to work with.

Department of Earth Science | Northeastern Illinois University

© 2005 Laura L. Sanders.  Last updated October 17, 2005.