1. Research Scientist, Dept. of Water Environmental Engineering Research, National Institute of Environmental Research, Environmental Research Complex, Kyungseo-dong, Seo-gu, Incheon 404-708, Republic of Korea.
2. Research Hydrologist, USDA Forest Service, Center for Forested Wetlands Research, 3734 Highway 402, Cordesville, SC 29434 (corresponding author).
3. Research Associate Professor, Dept. of Biological and Agricultural Engineering, North Carolina State Univ., Campus Box 7625, Raleigh, NC 27695.
4. William Neal Reynolds Distinguished Univ. Professor, Dept. of Biological and Agricultural Engineering, North Carolina State Univ., Campus Box 7625, Raleigh, NC 27695.
5. Principal Scientist, Weyerhaeuser Company, P.O. Box 2288, Columbus, MS 39704.