Objectives 1
Department of Earth Science |Northeastern Illinois University

ESCI 337
Spring, 2009

Daily Objectives #13 (March 3, 2009)                                        Dr. Sanders

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

v  Review:  Explain what is meant by hydrostratigraphy, and tell how it differs from lithostratigraphy.

What makes water flow?

w Review:  Explain the term hydraulic head, and tell how total hydraulic head relates to elevation head and pressure head.

w Review:  Define the water table in terms of total hydraulic head, pressure head, and elevation head.

w On a flow net, identify the following kinds of boundaries to a flow system:
    o    no-flow boundaries (sometimes these are impermeable boundaries)
o    water table boundary
o    constant head boundaries
o    constant flow boundaries (rarely used in modeling natural systems).

Distinguish between these kinds of boundaries:
        o    hydrostratigraphic
        o    hydrodynamic  (Hint: Explain why sometimes a "no-flow" boundary is an "impermeable" boundary--but other times, the term "impermeable" doesn't really apply.)

A flow system has been established in the ground water model.  Construct a flow net of the system by first measuring hydraulic heads in each of the piezometers, and then contouring the points with equipotential lines.  A grid showing the piezometer locations appears here (jpg file).

Department of Earth Science | Northeastern Illinois University

Copyright 2009 Laura L. Sanders.  Last updated March 4, 2009.