Time series of daily and/or monthly river discharge data from a constantly growing and updated dataset comprising currently 10,000 stations from 159 countries with approximately 440,000 station-years with an average time series length of about 44 years. The earliest daily data are from the year 1806.
The Annual Characteristics and Long-Term Statistics offer basic hydrological statistics of timeseries data of the gauging stations being represented in the Global Runoff Database. Annual characteristics are derived from monthly discharge data, either aggregated daily data or originally provided monthly data. Long-term statistics and long-term variability are derived from annual characteristics too.
The Global Terrestrial Network for River Discharge (GTN-R) is a component of the Global Terrestrial Network - Hydrology (GTN-H) supported by Global Climate Observing system (GCOS) and the Hydrology and Water Resources Programme of the WMO (HWRP). The basic idea of the GTN-R project is to draw together the already available real-time discharge data provided by the National Hydrological Services (NHS) and to redistribute it in a standardised way. Core component is the GCOS Baseline River Network of gauging stations located near to the mouth of the World's major rivers. In cooperation with the Hydrological Services of the WMO Member States this network is constantly being extended by confirmation of additional stations. The GCOS Baseline River Network is a project in progress with a current status as of December 2014 of 245 gauging stations worldwide. GRDC contributes to the GTN-H by the collection of river discharge data of these so-called GTN-R stations. As a first step, the data of daily river discharge at the GRDC stations corresponding to the GCOS Baseline River Network are provided to the public via the Geoportal of the German Federal Institute for Hydrology (BfG) using a standard Sensor Observation Service (SOS). The provision via the GEOSS Portal is intended (further details will be communicated in due time):
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, 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.
Time series of daily and/or monthly river discharge data of more than 9200 stations from 160 countries, comprising around 390,000 station-years with an average time series length of about 42 years. The earliest daily data are from the year 1806, the most recent from the year 2016.
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