1. Department of Geology; Kent State University; Kent Ohio USA
2. Department of Civil and Environmental Engineering; Colorado State University; Fort Collins Colorado USA
3. US Geological Survey Eastern Geographic Science Center; Reston Virginia USA
4. US Geological Survey MD-DC-DE Water Science Center; Baltimore Maryland USA
5. Department of Civil and Agricultural Engineering; National University of Colombia; Bogota Colombia
6. Department of Agricultural and Biological Engineering; Purdue University; West Lafayette Indiana USA