1. Department of Civil & Environmental Engineering, University of Iowa, Iowa City, Iowa 52242, United States
2. IIHR-Hydroscience
and Engineering, University of Iowa, Iowa City, Iowa 52242, United States
3. Department
of Chemistry, University of Iowa, Iowa City, Iowa 52242, United States
4. California
Water Science Center, U.S. Geological Survey, 6000 J Street, Placer Hall, Sacramento, California 95819, United States
5. Illinois-Iowa
Water Science Center, U.S. Geological Survey, 400 South Clinton Street, Iowa City, Iowa 52240, United States