William L. Graf is Educational Foundation University Professor and Professor of Geography at the University of South Carolina. His specialties include fluvial geomorphology and hydrology, as well as policy for public land and water. His PhD is from the University of Wisconsin, Madison, with a major in physical geography and a minor in water resources management. His research and teaching have focused on river-channel change, human impacts on river processes, morphology, and ecology, along with contaminant transport and storage in river systems. In the arena of public policy, he has emphasized the interaction of science and decision making, and the resolution of conflicts among economic development, historical preservation, and environmental restoration for rivers. He has authored or edited 7 books, more than 120 scientific papers, book chapters, and reports, more than 60 successful grant proposals, and more than 90 public presentations. He is past President of the Association of American Geographers and has been an officer in the Geological Society of America. President Clinton appointed him to the Presidential Commission on American Heritage Rivers. His National Research Council service includes membership of the Water Science and Technology Board and the Board on Earth Sciences and Resources, chairing NRC committees to advise the U.S. Geological Survey, the White House Council on Sustainable Development, and on innovative watershed management, as well as committee membership on several water science topics. He is a National Associate of the National Academies.