1. Ph.D. Candidate, Dept. of Civil Engineering, Univ. of Nebraska, Lincoln, NE 68588-6105.
2. Water Resources Engineer, HDR, Inc., 17111 Preston Rd., Suite 300, Dallas, TX 75248.
3. Instructor, Roanoke County (VA) Public Schools, 5937 Cove Rd., Roanoke, VA 24019; formerly, Civil Engineer, 352 B King George Ave. SW, Roanoke, VA 24016.
4. Professor, Dept. of Civil Engineering, Univ. of Nebraska, Lincoln, NE 68588-6105 (corresponding author).
5. Director of Services, Water Sciences Laboratory, Univ. of Nebraska, Lincoln, NE 68583-0844.
6. Associate Professor, Dept. of Civil Engineering, Univ. of Nebraska, Lincoln, NE 68588-6105.