Kimberly J Van Meter, The Pennsylvania State University, Earth and Environmental Systems Institute, State College, United States, Meredith Brehob, Oak Ridge Institute for Science and Education, Based at US EPA, Washington DC, United States, Jana Compton, U.S. Environmental Protection Agency, Office of Research and Development, Corvallis, United States, Gretchen P Oelsner, U.S. Geological Survey, New Mexico Water Science Center, Albuquerque, NM, United States, Robert Daniel Sabo, U.S. Environmental Protection Agency, Office of Water, Washington, United States, Sarah M Stackpoole, USGS, Water Resources Mission Area, Earth Systems Processes Division, Denver, United States, Dennis P Swaney, Cornell University, Dept. of Ecology & Evolutionary Biology, Ithaca, United States, Xin Zhang, Princeton University, Princeton, United States, Nandita B Basu, University of Waterloo, Department of Civil and Environmental Engineering, Waterloo, ON, Canada and nandita basu