Jun Zhang, University of Arizona, Tucson, AZ, United States, Laura E Condon, University of Arizona, Hydrology and Atmospheric Sciences, Tucson, AZ, United States, Hoang Tran, Colorado School of Mines, Geology and Geological Engineering, Golden, CO, United States; Colorado School of Mines, Department of Geology and Geological Engineering, Golden, CO, United States and Reed M Maxwell, Colorado School of Mines, Golden, CO, United States