1. Professor, Dept. of Civil and Environmental Engineering, IIHR Hydroscience and Engineering, The Univ. of Iowa, Iowa City, IA 52242 (corresponding author).
2. Graduate Student, Dept. of Civil and Environmental Engineering, IIHR Hydroscience and Engineering, The Univ. of Iowa, Iowa City, IA 52242.
3. Research Engineer, Dept. of Civil and Environmental Engineering, IIHR Hydroscience and Engineering, The Univ. of Iowa, Iowa City, IA 52242.