Respectively, Exposure Measurement and Assessment Division, Environmental and Occupational Health Sciences Institute (a joint project of the University of Medicine and Dentistry of New Jersey-R.W. Johnson Medical School and Rutgers University), 170 Frelinghuysen Road, Piscataway, New Jersey 08854; and Division of Science and Research, New Jersey Department of Environmental Protection, 401 East State Street, Trenton, New Jersey 08625 (E-Mail/Georgopoulos: firstname.lastname@example.org).
GEOSTATISTICAL ESTIMATION OF HORIZONTAL HYDRAULIC CONDUCTIVITY FOR THE KIRKWOOD-COHANSEY AQUIFER1
Article first published online: 8 JUN 2007
JAWRA Journal of the American Water Resources Association
Volume 40, Issue 1, pages 187–195, February 2004
How to Cite
Vyas, V. M., Tong, S. N., Uchrin, C., Georgopoulos, P. G. and Carter, G. P. (2004), GEOSTATISTICAL ESTIMATION OF HORIZONTAL HYDRAULIC CONDUCTIVITY FOR THE KIRKWOOD-COHANSEY AQUIFER. JAWRA Journal of the American Water Resources Association, 40: 187–195. doi: 10.1111/j.1752-1688.2004.tb01018.x
Paper No. 03080 of the Journal of the American Water Resources Association (JAWRA) (Copyright © 2004). Discussions are open until August 1, 2004.
- Issue published online: 8 JUN 2007
- Article first published online: 8 JUN 2007
- geostatistical analysis;
- ground water hydrology;
- statistical analysis;
- geographic information systems;
- hydraulic conductivity;
- Bayesian maximum entropy method;
- Kirkwood-Cohansey aquifer
ABSTRACT: The Kirkwood-Cohansey aquifer has been identified as a critical source for meeting existing and expected water supply needs for southern New Jersey. Several contaminated sites exist in the region; their impact on the aquifer has to be evaluated using ground water flow and transport models. Ground water modeling depends on availability of measured hydrogeologic data (e.g., hydraulic conductivity, for parameterization of the modeling runs). However, field measurements of such critical data have inadequate spatial density, and their locations are often clustered. The goal of this study was to research, compile, and geocode existing data, then use geostatistics and advanced mapping methods to develop a map of horizontal hydraulic conductivity for the Kirkwood-Cohansey aquifer. Spatial interpolation of horizontal hydraulic conductivity measurements was performed using the Bayesian Maximum Entropy (BME) Method implemented in the BMELib code library. This involved the integration of actual measurements with soft information on likely ranges of hydraulic conductivity at a given location to obtain estimate maps. The estimation error variance maps provide an insight into the uncertainty associated with the estimates, and indicate areas where more information on hydraulic conductivity is required.