ABSTRACT This paper investigates the relationship between the two parameters, aquifer media and hydraulic conductiv-ity, and assesses their reliability for aquifer vulnerability assessment. To evaluate the possible non-inde-pendence of the parameters in question, sensitivity analysis procedure was used in a GIS environment. The procedure was tested in three areas where aquifer vulnerability was assessed, corresponding to three different hydrogeological settings. The applications demonstrate that non-independence is confirmed and is more evident in alluvial and volcano-pyroclastic aquifers.
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nullD. Ducci, "Aquifer Vulnerability Assessment Methods: The Non-Independence of Parameters Problem," Journal of Water Resource and Protection, Vol. 2 No. 4, 2010, pp. 298-308. doi: 10.4236/jwarp.2010.24034.
 A. N. Findikakis and F. Stauffer, “Groundwater: An Endangered Resource,” Proceedings of the 27th Congress of the International Association for Hydraulic Research, San Francisco, 10-15 August 1997, pp. 132-137.
 National Research Council, Committee on Techniques for Assessing Ground Water Vulnerability, Water Science and Technology Board, Commission on Geosciences, Environment, and Resources, “Ground Water Vulnerabil-ity Assessment: Predicting Relative Contamination Poten-tial under
Uncertainty,” National Academy of Sciences Press, Washington, D.C., 1993, p. 210.
 L. Aller, T. Bennet, J. H. Leher, R. J. Petty and G. Hack-ett, “Drastic: A Standardised System for Evaluating Groundwater Pollution Potential Using Hydrogeologic Settings,” EPA 600/2-87-035, 1987, p. 641.
 M. Civita, “Le carte della vulnerabilità degli acquiferi all'inquinamento,” Teoria e Pratica, Pitagora Bologna, 1994, p. 325.
 M. Civita and M. de Maio, “SINTACS R5-Valutazione e cartografia automatica della vulnerabilità degli acquiferi all'inquinamento con il sistema parametrico,” Pitagora Bologna, 2000, p. 226.
 A. Corniello, D. Ducci and P. M. Guarino, “I rilievi Carbonatici del Matese Occidentale e la Piana di Venafro: Idrogeologia ed Idrogeochimica,” Bollettino della Societa Geologica Italiana, 1999, pp. 523-535.
 R. Alvino, A. Corniello and D. Ducci, “Aquifer Pollution Vulnerability in the Roccamonfina Volcano Area,” Groundwater Quality: Remediation and Protection: Proceedings of Groundwater Quality Conference, Tübingen, No. 250, 21-25 September 1998, pp. 63-67.
 R. Alvino, “Idrodinamica sotterranea e bilancio idr- ogeologico del vulcano di Roccamonfina (Campania),” Ph.D. Thesis, Perugia University, 1997, p. 276
 A. Corniello, D. Ducci and G. M. Monti, “Piana di Venafro (Molise): Carta Della Vulnerabilità All’Inquinamento,” Atti dei Convegni Lincei, Vol. 154, 1998, pp. 311-315.
 A. Corniello and D. Ducci, “Pollution Vulnerability Assessment in Karstic Aquifers: A Case Study of the Matese Mountains,” In: O. Sililo et al., Ed., 30th Interna-tional Association of Hydrogeologists Congress on Groundwater: Past Achievements and Future Challenges Cape Town, Balkema, Rotterdam, 26 November-1 De-cember 2000, pp. 725-730.
 B. Engel, K. Navulur, B. Cooper and L. Hahn, “Estimat-ing Groundwater Vulnerability to Nonpoint Source Pollu-tion from Nitrates and Pesticides on a Regional Scale,” Proceedings of the HydroGIS 96 Conference: Applica-tions of GIS in Hydrology and Water Resources Man-agement, Vienna, Austria, 16-19 April 1996, pp. 521-526.
 W. A. Lodwick, W. Monson and L. Svoboda, “Attribute error and Sensitivity Analysis of Map Operations in Geo-graphical Information Systems: Suitability Analysis,” In-ternational Journal of Geographical Information Science, Vol. 4, No. 4, 1990, pp. 413-428.
 G. B. M. Heuvelink, “Error propagation in Environmental Modelling with GIS,” Taylor & Francis Ltd., UK, 1998, p. 127.
 P. Napolitano and A. G. Fabbri, “Single-parameter Sensi-tivity Analysis for Aquifer Vulnerability Assessment Us-ing DRASTIC & SINTACS,” HydroGIS 96: Application of Geographic Information Systems in Hydrology and Water Resources Management, Vienna, No. 235, April 1996, pp. 559-566.
 L. Rosen, “A Study of the DRASTIC Methodology with Emphasis on Swedish Conditions: Ground Water,” Vol. 32, No. 2, 1994, pp. 278-285.
 G. P. Panagopoulos, A. K. Antonakos and N. J. Lambrakis, “Optimization of the DRASTIC Method for Groundwater Vulnerability Assessment via the Use of Simple Statistical Methods and GIS,” Hydrogeology Journal, Vol. 14, No. 6, 2006, pp. 894-911.