Approximately 120 engineers and scientists from 20 countries attended the September 1975 meetings of the International Association of Hydrological Sciences (IAHS) in Grenoble, France. Of the attendees, approximately 20 were from the United States. A. Ivan Johnson (Office of Water Data Coordination, U.S. Geological Survey, Reston, Virginia) served as Chief U.S. Delegate to IAHS and as member of the Bureau of IAHS. William C. Ackermann (Illinois State Water Survey, Urbana) served as Alternate Chief Delegate to IAHS and as Member of the Bureau of IUGG.