Geosynthetics April/May 2020 - 23
of sampling. Create a "best fit" curve for
the daily leakage rate data set in order
to project future flows. Solve for the "x"
value where the "y" value is equal to the
site's ALR. This can estimate the number
of days remaining until the flows get down
to an acceptable level.
In tandem with ELL testing for leaks in
the primary geomembrane, LDS material
testing and matching the measured flows
to the theoretical curve should provide sufficient evidence that the leakage is attributed to residual construction water and not
to leakage of the primary geomembrane.
References
Bonaparte, R., and Gross, B. A. (1992). "LDCRS flow from
double-lined landfills and surface impoundments." U.S.
Environmental Protection Agency, Cincinnati, Ohio,
Contract No. 68-C0-0068.
Gilson-Beck, A. (2019). "Controlling leakage through
installed geomembranes using electrical leak location."
Geotextiles and Geomembranes 47, 697-710.
Gross, B. A., Bonaparte, R., and Giroud, J. P. (1990).
"Evaluation of flow from landfill leakage detection layers."
Proc., 4th Int. Conf. on Geotextiles, Vol. 2, The Hague,
Netherlands, 481-486.
Johnson, A. I., Prill, R. C., and Morris, D. A. (1963). "Specific
yield: Column drainage and centrifuge moisture content."
U.S. Geological Survey Water-Supply Paper.
Johnson, A. I. (1963). "Specific yield: Compilation of
specific yields for various materials." U.S. Geological Survey
Water-Supply Paper 1662-D.
>> For more, search LDS
at www.GeosyntheticsMagazine.com.
King, F. H. (1899). "Principles and conditions of the
movements of ground water." U.S. Geological Survey 19th
Annual Report, pt. 2, 86-91.
Meinzner, O. E. (1923). "The occurrence of ground water
in the United States, with a discussion of principles." U.S.
Geological Survey Water-Supply Paper 489.
Stephens, D. B. (1996). Vadose zone hydrology, CRC Press,
Boca Raton, Fla., 11-12.
U.S. EPA (1992). "Action leakage rates for leak detection
systems." U.S. Environmental Protection Agency. G
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Geosynthetics April/May 2020
Table of Contents for the Digital Edition of Geosynthetics April/May 2020
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