Wednesday, April 2, 2008 : 8:20 a.m.
Assessing Global Ground-Water Resources under the Pressures of Climate Change and Linked Human Activities
Jason J. Gurdak, U.S. Geological Survey Jason Gurdak is a hydrologist in the Colorado Water Science Center of the U.S. Geological Survey with a Ph.D. in geochemistry from the Colorado School of Mines. His general research interests include studies of ground water, contaminant hydrology, and hydroclimatology. Recent efforts have focused on the High Plains aquifer, including regional-scale modeling of nonpoint-source contamination, estimating model uncertainty, unsaturated-zone water and chemical flux studies, and investigations of subsurface hydrologic and geochemical response to natural climate variability on interannual to multidecadal scales. He has served the UNESCO-GRAPHIC project since 2005.
Timothy R. Green, USDA, Agricultural Research Service Dr. Timothy R. Green is a hydrologist with the USDA, Agricultural Research Service. His research career also includes a PhD dissertation at Stanford University, three years with the USGS Water Resources Division, and four years with CSIRO Australia Land & Water. Green’s research addresses spatial measurement and scaling of soil water and topography, upscaling soil hydraulic properties, numerical simulation of water movement in variable terrain and groundwater recharge, and hydrologic assessment of potential climate change. Green has served the UNESCO-GRAPHIC project since its inception in 2004, and recently co-edited a special issue of the Vadose Zone Journal on GRAPHIC research.