1. Now at National Research Program, United States Geological SurveyReston Virginia USA
2. Department of Civil & Environmental Engineering, Colorado School of MinesCenter for Experimental Study of Subsurface Environmental ProcessesGolden Colorado USA
3. Earth and Environmental Sciences Division, Los Alamos National LaboratoryLos Alamos NM USA
4. Now at River and Reservoir Operations GroupBureau of ReclamationBoise ID USA