Global Runoff Data Base (GRDC)

World-wide repository of river discharge data for the exchange of hydrological data and information on the global scale. The Global Runoff Data Base (GRDB) is built on an initial dataset collected in the early 1980s from the responses to a WMO request to its member countries to provide a global hydrological data set to complement a specific set of atmospheric data in the framework of the First Global GARP Experiment (FGGE). The initial dataset of monthly river discharge data over a period of several years around 1980 was supplemented with the UNESCO monthly river discharge data collection 1965-85. Today the database comprises discharge data of well over 10,000 gauging stations from all over the world.