............................................................................................VII ACKNOWLEDEMENTS..............................................................................X

Abstract Univariate and bivariate spectral analyses were applied to the study of two karstic systems in the Central Apennines (Italy). The analyses allowed the characterization of the transformations between the input rainfall and the output discharge. Although the development of the karstification is very different, the two aquifers show very similar behaviour. Both systems present very high m...

Environmental concerns regarding the potential for drinking water contamination in shallow aquifers have accompanied unconventional energy development in the northern Appalachian Basin. These activities have also raised several critical questions about the hydrogeological parameters that control the naturally occurring presence and migration of hydrocarbon gases in shallow aquifers within petro...

The transboundary nature of water dividing Mexico and the United States (U.S.) transforms the entire border region into an instrument of cooperation, a source of conflict, a national security issue, and an environmental concern. Reasonable data collection and research analysis have been conducted for surface waters by joint governmental institutions and non-governmental bodies. However, with th...

Large-scale models are frequently used to estimate fluxes to small-scale models. The uncertainty associated with these flux estimates, however, is rarely addressed. We present a case study from the Española Basin, northern New Mexico, where we use a basin-scale model coupled with a high-resolution, nested site-scale model. Both models are three-dimensional and are analyzed by codes FEHM and PES...

C. M. Schmidt,* A. T. Fisher, A. Racz, C. G. Wheat, M. Los Huertos and B. Lockwood 1 Earth and Planetary Sciences Department, University of California, Santa Cruz, CA, USA 2 Global Undersea Research Unit, University of Alaska, Fairbanks, AK, USA 3 Science and Environmental Policy Department, California State University, Monterey Bay, CA, USA 4 Pajaro Valley Water Management Agency, Watsonville,...

An analytical solution for calculating the residence time of fluid flowing toward a pumping well in an unconfined aquifer has been developed. The analytical solution was derived based on a radial, steady-state, Dupuit-Forchheimer flow model. The resulting integral expression involved computing the imaginary error function, for which a simple series expansion is proposed. The validity of the ana...

Copyright © 2012 by The Geochemical Society of Japan. as spectroscopic characteristics was discussed in some studies (Wassenaar et al., 1990; Grøn et al., 1996; Artinger et al., 2000). Thurman (1985) studied several properties of HS isolated from Ca(HCO3)2 and CaSO4-rich groundwater originating from different depths in sandy, dolomitic or limy aquifers. He found that groundwater containing orga...

Carbon Capture and Storage may use deep saline aquifers for CO(2) sequestration, but small CO(2) leakage could pose a risk to overlying fresh groundwater. We performed laboratory incubations of CO(2) infiltration under oxidizing conditions for >300 days on samples from four freshwater aquifers to 1) understand how CO(2) leakage affects freshwater quality; 2) develop selection criteria for deep ...