1. National Center for Computational Hydroscience and Engineering, Univ. of Mississippi, University, MS 38677 (corresponding author).
2. USDA Agricultural Research Service National Sedimentation Laboratory, Oxford, MS 38655.
3. National Center for Computational Hydroscience and Engineering, Univ. of Mississippi, University, MS 38677.
4. School of Civil and Environmental Engineering, Georgia Institute of Technology, Savannah, GA 31407.