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Portions of a geographical area which constitutes a hydrogeological unit as the catchment area for a single river which are under the jurisdiction of two or more countries. (Source: GEMET/WPRa)

Transboundary waters means any surface or ground waters which mark, cross or are located on boundaries between two or more States; wherever transboundary waters flow directly into the sea, these transboundary waters end at a straight line across their respective mouths between points on the low-water line of their banks (Source: 1992 Water Convention, Art.1)

In other languages

international watercourse
международный водный путь
cursos de agua internacionales
مجرى مائي دولي

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Multilateral environment agreements tagged with cours d'eau international

You can see below a list of multilateral environment agreements. Use the links on the right to view the content tagged with cours d'eau international. This includes official treaty texts, decisions, recommendations, and other related informational documents such as publications, annuals, meetings, documents or reports.
Convention de Bâle
Convention sur l´eau
Convention sur les effets transfrontières des accidents industriels


UN Watercourses Convention Online User´s Guide

Interviews on the UNECE Water Convention

Videolecture - Evolution, Codification and Current Status of International Water Law