Title:
Groundwater Resource Management Planning For North Georgia
Groundwater Resource Management Planning For North Georgia
Authors
Hollingsworth, Lisa J.
Atkins, Robert L.
Atkins, Robert L.
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Abstract
In North Georgia, groundwater can be a reliable, cost-effective, and long-term source of public water supply. Wells in the Piedmont and Blue Ridge provinces of
Georgia have reported yields of up to 800,000 gallons per day
(gpd), and wells in the Valley and Ridge province have
reported yields in excess of one million gpd. While impressive,
these wells may not sustain these yields without proper
management. A Groundwater Resource Management Plan
should be developed based on the aquifer test and recovery
test for each well, and be subsequently modified based on
well characteristics observed during long-term pumping.
Well testing is a major component of a Ground-water
Resource Management Plan, and there are various types of
tests for different applications. Drillers' air lift tests provide
a rough estimate of the well's yield. Step drawdown tests are
used to determine the size of the pump to be used for the
drawdown test, which is a long-term measure of the well's
production capability. Recovery testing, conducted at the end
of the drawdown test, provides the data necessary to
determine the well's safe yield and the production capacity.
Groundwater resource management strategies help ensure Groundwater resource management strategies help ensure
long-term sustained pumping. These strategies include:
• installing the production pump above the uppermost waterproducing
zone, to avoid dewatering the water-bearing zone
and to prevent the introduction of iron bacteria into the well.
• maintaining accurate records of the production pumping
rate, drawdown, pumping water levels, and pumping duration,
to identify changes in water availability. Pumping rates can
be adjusted to reflect the seasonal characteristics of the aquifer.
• allowing the well a recovery period, scheduled on a daily or
weekly basis. In this way, a well's yield can be optimized
while achieving a balance between the water demand
schedule and necessary well recovery.
Sponsor
Sponsored and Organized by: U.S. Geological Survey, Georgia Department of Natural Resources, The University of Georgia, Georgia State University, Georgia Institute of Technology
Date Issued
1995-04
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