Data Characteristics
Data Characteristics Unit of measure used Unit of measure used Power code Power code Other Aspects Other Aspects Other comments Other commentsLast updated: December 16, 2020
Contact: ENV.Stat@oecd.org
Data for non-OECD countries is sourced from UNSD (https://unstats.un.org/unsd/envstats/qindicators.cshtml)
Australia: Long-term annual average 1911-12 to 2018-19. For more information see http://www.bom.gov.au/water/rwi/#ro_tt/001/2019
Austria: Long-term annual average 1986-2015
Belgium: Long-term annual average 2007-2017; 2013-2017 for Brussels
Canada: Long-term annual average 1971-2004
Chile: Long-term annual average 2000-2014
Colombia: Long-term annual average 1974-2012
Czech Republic: Long-term annual average 1985-2010
Denmark: Long-term annual average 1995-2015
Finland: Long-term annual average 1981-2010
France: Long-term annual average: 1981-2010.
Germany: Long-term annual average 1995-2015
Hungary: Long-term annual average 1971-2000
Ireland: Long-term annual average 1981-2010. Inflow and outflow: data refers to flows of two main rivers crossing with Norther Ireland. Groundwater available for annual abstraction was estimated taking 10% of "Recharge into the Aquifer" (period 1971-2000). Freshwater resources 95% of years was estimated by taking the second lowest annual figure for "Total Renewable Freshwater Resources" over the previous 20 years.
Israel: Long-term annual average 2000-2013
Italy: Long-term annual average 1961-2017
Japan: Long-term annual average 1971-2006
Korea: Long-term annual average 1986-2015
Latvia: Long-term annual average 1961-2010
Lithuania: Long-term annual average 2000-2015. Evapotranspiration is estimated from one station only in the middle of the country.
Mexico: The long-term annual average covers the period 1981-2010 for precipitations, the other values are annual.
Netherlands: Long-term annual average 1981-2010. Actual evapotranspiration refers to "reference crop evapotranspiration", and therefore internal flow is calculated as precipitation minus reference crop evapotranspiration. It should be noted that in general this results in a lower value for Internal Flow and resulting (Internal) Renewable Fresh Water Resources.
New Zealand: Long-term annual average 1995-2014
Norway: The data for precipitation and evapotranspiration refer to the period LTAA (long-term annual average) 1961-90 whereas the others to the period LTAA 1981-2010, that is why precipitation minus evapotranspiration is different from internal resources.
Poland: Long-term annual average 1981-2010.
Portugal: data on precipitation excludes overseas territories and evapotranspiration is potential, not actual.
Slovak Republic: Long-term annual average is 1961-2000
Slovenia: Long-term annual average is 1971-2000
Sweden: Long-term annual average: 1990-2018. For more information see https://www.smhi.se/data/hydrologi/vattenwebb/om-data-i-vattenwebb/kalibrering-och-utvardering-av-s-hype-1.26735
Switzerland: Long-term annual average: 1981-2010
Turkey: Long-term annual average: data for precipitation refers to the period 1970-2011, data for evapotranspiration to 1980-2011
Costa Rica: The long-term annual average refers to 2001-2017
Russia: The long-term annual average refers to 1936-1980
Last updated: December 16, 2020
Contact: ENV.Stat@oecd.org
Data for non-OECD countries is sourced from UNSD (https://unstats.un.org/unsd/envstats/qindicators.cshtml)
Australia: Long-term annual average 1911-12 to 2018-19. For more information see http://www.bom.gov.au/water/rwi/#ro_tt/001/2019
Austria: Long-term annual average 1986-2015
Belgium: Long-term annual average 2007-2017; 2013-2017 for Brussels
Canada: Long-term annual average 1971-2004
Chile: Long-term annual average 2000-2014
Colombia: Long-term annual average 1974-2012
Czech Republic: Long-term annual average 1985-2010
Denmark: Long-term annual average 1995-2015
Finland: Long-term annual average 1981-2010
France: Long-term annual average: 1981-2010.
Germany: Long-term annual average 1995-2015
Hungary: Long-term annual average 1971-2000
Ireland: Long-term annual average 1981-2010. Inflow and outflow: data refers to flows of two main rivers crossing with Norther Ireland. Groundwater available for annual abstraction was estimated taking 10% of "Recharge into the Aquifer" (period 1971-2000). Freshwater resources 95% of years was estimated by taking the second lowest annual figure for "Total Renewable Freshwater Resources" over the previous 20 years.
Israel: Long-term annual average 2000-2013
Italy: Long-term annual average 1961-2017
Japan: Long-term annual average 1971-2006
Korea: Long-term annual average 1986-2015
Latvia: Long-term annual average 1961-2010
Lithuania: Long-term annual average 2000-2015. Evapotranspiration is estimated from one station only in the middle of the country.
Mexico: The long-term annual average covers the period 1981-2010 for precipitations, the other values are annual.
Netherlands: Long-term annual average 1981-2010. Actual evapotranspiration refers to "reference crop evapotranspiration", and therefore internal flow is calculated as precipitation minus reference crop evapotranspiration. It should be noted that in general this results in a lower value for Internal Flow and resulting (Internal) Renewable Fresh Water Resources.
New Zealand: Long-term annual average 1995-2014
Norway: The data for precipitation and evapotranspiration refer to the period LTAA (long-term annual average) 1961-90 whereas the others to the period LTAA 1981-2010, that is why precipitation minus evapotranspiration is different from internal resources.
Poland: Long-term annual average 1981-2010.
Portugal: data on precipitation excludes overseas territories and evapotranspiration is potential, not actual.
Slovak Republic: Long-term annual average is 1961-2000
Slovenia: Long-term annual average is 1971-2000
Sweden: Long-term annual average: 1990-2018. For more information see https://www.smhi.se/data/hydrologi/vattenwebb/om-data-i-vattenwebb/kalibrering-och-utvardering-av-s-hype-1.26735
Switzerland: Long-term annual average: 1981-2010
Turkey: Long-term annual average: data for precipitation refers to the period 1970-2011, data for evapotranspiration to 1980-2011
Costa Rica: The long-term annual average refers to 2001-2017
Russia: The long-term annual average refers to 1936-1980