A jackknife approach to examine uncertainty and temporal change in the spatial correlation of a VOC plume

The application of geostatistics to spatial interpolation of time-invariant properties in ground-water studies (such as transmissivity or aquifer thickness) is well documented. The use of geostatistics on time-variant conditions such as ground-water quality is also becoming more commonplace. Unfortu...

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Bibliographic Details
Published in:Environmental monitoring and assessment 1999-11, Vol.59 (1), p.31-46
Main Authors: VARLJEN, M. D, BARCELONA, M. J, WEHRMANN, H. A
Format: Article
Language:English
Subjects:
Applied sciences
Aquifers
Earth sciences
Earth, ocean, space
Engineering and environment geology. Geothermics
Environmental monitoring
Exact sciences and technology
Geostatistics
Groundwater
Groundwater pollution
Groundwater studies
Groundwaters
Natural water pollution
Organic compounds
Pollution
Pollution, environment geology
Transmissivity
Trichloroethane
USA, Illinois
VOCs
Volatile organic compounds
Water pollution
Water quality
Water treatment and pollution
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Summary:The application of geostatistics to spatial interpolation of time-invariant properties in ground-water studies (such as transmissivity or aquifer thickness) is well documented. The use of geostatistics on time-variant conditions such as ground-water quality is also becoming more commonplace. Unfortunately, the detection of temporal changes in spatial correlation through direct comparison of experimental semivariograms is difficult due to the uncertainty in sample semivariograms constructed from field data. This paper discusses the use of the jackknife approach to estimate confidence limits of semivariograms of trichloroethane (TC) and other volatile organic compounds (VOC) in contaminated ground-water in northern Illinois. Examination of the 'spread' of the confidence limits about the semivariograms created from two types of sampling networks are discussed.[PUBLICATION ABSTRACT]
ISSN:0167-6369
1573-2959
DOI:10.1023/A:1006093526872