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Convention on the Protection and Use of Transboundary Watercourses and International Lakes

International treaty

  • 7 min read
  • 5 chapters

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It was opened for signature in Helsinki on 17 March 1992 and entered into force on 6 October 1996. As of November 2022, it has been ratified by 47 parties, which includes 46 states and the European Union. It has been signed but not ratified by the United Kingdom.

About the Convention

Some of the UNECE's water related problems are of water quantity and water quality, high water stress and overexploitation of water resources, increasing droughts and floods, contaminated water resulting in water-related diseases, etc. These issues are even harder to solve due to transboundary nature of the water sources in the UNECE region. More than 150 major rivers and 50 large lakes are either shared or are situated along the borders of two or more countries.

The Water Convention approaches its issues in a holistic way, equally emphasizing the importance of ecosystems, human societies and economies, and stressing the integrated water management instead the previously used focus on specific localized problems.

In 2003, the Water Convention was amended, allowing countries outside the UNECE region to join the convention, and thus benefit from its legal framework and experience; the amendment entered into force in 2013. This is especially beneficial for countries bordering UNECE region.

History of international agreements concerning transboundary waters

UNECE's records on transboundary water agreements previous to the Water Convention:

  • in 1858 Austria and Bavaria signed the agreement concerning the regulation and management of the river Inn
  • in 1863 Belgium and the Netherlands signed the treaty concerning the regulation of water supply from the Meuse
  • in 1890 Germany and Switzerland signed the agreement concerning the hydropower station at Rheinfelden
  • from 1909 dates the first and still existing agreement covering both water-quality and water-quantity issues, and setting up a joint body, between Great Britain and the United States of America relating to boundary waters between Canada and the United States

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