1. Assistant Professor, Dept. of Engineering, Institute for Coastal Science and Policy, East Carolina Univ., 250 Slay, Mail Stop 117, Greenville, NC 27858 (corresponding author).
2. Professor, Agricultural and Biological Engineering Dept., Director, Center for Landscape Conservation and Ecology, Univ. of Florida, P.O. Box 110570, Gainesville, FL 32611-0570.