1. Postdoctoral Research Associate, Water Resources Research Center, Univ. of Hawaii at Manoa, Honolulu, HI 96822 (corresponding author).
2. Associate Director, Water Resources Research Center, and Professor, Dept. of Geology and Geophysics, Univ. of Hawaii at Manoa, Honolulu, HI 96822.
3. Associate Professor, Dept. of Geology and Geophysics, Univ. of Hawaii at Manoa, Honolulu, HI 96822.