The International Conference on Channel Flow and Catchment Runoff was held May 22–26 at the University of Virginia, Charlottesville, in honor of the centennial of Manning's Formula and Kuichling's Rational Formula. Sponsors were the American Geophysical Union, American Society of Civil Engineers, International Association for Hydraulic Research, and International Water Resources Association. Support came from the University of Virginia and the National Weather Service of the National Oceanic and Atmospheric Administration. Scientists from 24 countries gave about 100 presentations.