1. Graduate Student, IIHR-Hydrosicence and Engineering, Univ. of Iowa, Iowa City, IA 52242.
2. Associate Professor, IIHR-Hydrosicence and Engineering, Univ. of Iowa, Iowa City, IA 52242.
3. Assistant Professor, IIHR-Hydrosicence and Engineering, Univ. of Iowa, Iowa City, IA 52242 (corresponding author).