The database of the Rez¿ urban catchments includes not only rainfall and flow rates from two small catchments recorded continuously with a time step of 1 min over a 7-year period, but also tensiometric, piezometric, and meteorological measurements. This database has been complemented by information on the catchments themselves by means of digitized land use and topographic maps. This database is regularly updated and available to researchers through the Internet file transfer protocol. ¿ 1999 American Geophysical Union