Présentations Colloques

    Session 7.05: The Challenges for Transboundary aquifer management
    Carvalho Resende Tales
    Fact and figures about transboundary groundwater and international cooperation
    Shared groundwater resources have long been neglected by water law. While there are more than 450 agreements on international waters which generally focusing on surface water, , there are only 6 agreements squarely addressing shared groundwater resources. As a result, the rules governing the use, management, and conservation of transboundary groundwater resources are often unclear to water practitioners. However, groundwater resources are an inseparable component of the total water system and interact with other components of the water cycle, both in terms of flow between these components and by being to some extent, substitutable in meeting water demands. ****The objective of this contribution is to present appropriate data and information for global discussion on the status of transboundary aquifers, particularly regarding cooperation aspects in order to provide both the general public and practitioners with information on transboundary aquifers, in order to facilitate their understanding of the challenges and a better consideration of the need for conjunctive management of both ground and surface waters.****The communication will present outputs from a GIS database compiled by the UNESCO International Hydrological Programme (IHP) aimed at providing a first attempt to represent cases where conditions for establishing integrated management of transboundary groundwater and transboundary surface water are both relatively favourable and in tune with governance priorities. It was created in order to identify aquifers located in river basins exposed to risks whether they be political, hydrological or environmental, and provides a wide range of indicators on 276 transboundary river basins, and 592 shared aquifers. The contribution builds also on the results of the groundwater component of the Transboundary Water Assessment Programme (TWAP) undertaken by UNESCO-IHP, which constitutes the first comprehensive indicator-based global assessment of status and trends in 199 transboundary aquifers around the world, covering physical, socio-economic and governance aspects.**


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