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The AAPG/Datapages Combined Publications Database
Houston Geological Society Bulletin
Abstract
Abstract: Geology, Geophysics and
Waste Tracking
By
Geology is the limiting factor in the study of virtually
every waste disposal site. While aquifers and confining
layers may be defined by borings, the hydrology is often
complicated by channels, faults, clay lenses and other
geologic realities. Site input is dependent on sources such as
barrels, drain pipes and disposal points. It would seem that
the situation is ripe for the application of geophysical
measurements. In many cases, the geology and various
contaminant sources offer physical contrasts ammenable
for study. Geophysics is an ideal, non-intrusive, investigative
tool.
Geophysical
techniques for waste site study include
seismic reflection and refraction, ground penetrating radar
and active and passive electromagnetic, magnetic and
resistivity profiling. Applications range from simply finding
drums to tracking contaminant plumes. Examples of each of
these in the Houston area will be discussed and an
application rationale developed. Perhaps more importantly,
the role of
geophysical
measurements within the current
regulatory framework will be discussed. There are disadvantages
inherent in the uncertainty of interpreted, indirect
measurements where certainty is required. On the other
hand, a continuous, objective picture of the shallow subsurface
is very useful. The role of geophysics is an evolving
one, and the future promises to be very interesting.
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