This page provides a brief outline of, lists the main points of, gives links to figures for, and lists the assigned reading for a lecture in Dr. Bruce Railsback's GEOL 1121 class at the University of Georgia. This page is not intended as a set of lecture notes, and it cannot subsititute for a set of lecture notes. Familiarity with this page alone will not assure satisfactory grades on exams in the course.

Lecture 24 (Wednesday, March 27, 2002): Groundwater II (Chemical Hydrology)

Brief outline of this lecture:
General groundwater geochemistry
Troublesome groundwater characteristics
Groundwater contamination
Contruction of landfills

Main points of this lecture:
Bicarbonate is the most abundant dissolved solid (or solute) in most groundwater.
The common solutes in groundwater are the ions released by chemical weathering.
pH and total dissolved solids commonly increase with depth in groundwater.
Natural groundwater can have characteristics making it non-deal for human use.
Human-made features that intercept the water table become possible entry points for pollutants of groundwater.
Landfills can be sources of pollutants of groundwater.
Many human-made features can be sources of pollutants of groundwater.
The products and services we buy commony have a hidden cost in groundwater contamination.

Figures used in this lecture:
Chemical composition of Georgia groundwater
Groundwater solutes on the periodic table
pH and Total Dissolved Solids of groundwater in the Georgia Coastal Plain
Troublesome groundwater characteristics
A scenario for groundwater contamination
Another scenario for groundwater contamination
A hypothetical modern landfill
Possible sources of groundwater contaminants
     For more information, see Virginia Tech's Groundwater Pollution Primer

Reading assignment: pp. 235-247; 356-359; 364-366 (including Box 15.1).

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