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Long-Term Mean Monthly Discharges and Annual Characteristics of GRDC Stations (GRDC, 2017)

The Long-Term Mean Monthly Discharges and Annual Characteristics offer basic statistics of all stations being represented in the Global Runoff Database:

  • annual means, lowest, and highest monthly discharges for individual years,
  • long-term mean, lowest, and highest monthly discharges of time series with at least five years of observation each with at least ten monthly values,
  • long-term inner-annual mean, lowest and highest monthly discharges of time series with at least five values of a specific month, and their standard deviations.

The monthly primary values are provided station by station as ASCII-text files (see example on the right margin), named with pvm-prefix and station numbers. For download, all files are grouped by WMO Regions. Please note, that statistics are only provided for timeseries of daily discharge values from years with less than ten months and months with less than ten days missing.

Please cite in your publication the GRDC as the source of the data: GRDC (2017): Long-Term Mean Monthly Discharges and Annual Characteristics of GRDC Stations / Online provided by the Global Runoff Data Centre of WMO. Koblenz: Federal Institute of Hydrology (BfG), [Date of retrieval:YYYY-MM-DD].

WMO RegionCoverageNumber of stationsArchive
1Africa1554Download (0,7 MB)
2Asia1918Download (1,7 MB)
3South America741Download (1,3 MB)
4North & Central America2327Download (3,3 MB)
5Australia & Pacific555Download (0,2 MB)
6Europe & Mediterranean Asia2227Download (0,6 MB)
Total: 9322

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