The GRDC is an international archive of data up to 200 years old, and fosters multinational and global long-term hydrological studies. Originally established three decades ago, the aim of the GRDC is to help earth scientists analyse global climate trends and assess environmental impacts and risks. Operating under the auspices of WMO the database of quality controlled �historical� mean daily and monthly discharge data grows steadily and currently comprises river discharge data of well over 10,000 stations from 159 countries.
