YANG, Qiang, Lamont-Doherty Earth Observatory, Columbia University, 61 Route 9W, Palisades, NY 10964, CULBERTSON, Charles, Maine Water Science Center, USGS, 196 Whitten Rd, Augusta, ME 04330, MARVINNEY, Robert G., Maine Geological Survey, 93 State House Station, Augusta, ME 04333-0093, SMITHERMAN, Paul, Spatial Information Science and Engineering, University of Maine, 5711 Boardman Hall, Orono, ME 04469, HESS, C.T., Physics and Astronomy, University of Maine, 103 Bennett Hall, Orono, ME 04469 and ZHENG, Yan, Queens College, CUNY, Flushing, NY 11367, and Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964, qyang@ldeo.columbia.edu