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This article aims to analyze the dimension of direct impacts of climate change on water resources in Portugal, given its geographic position downstream, in relation to Spain, given that 2/3 of is continental territory is located in international river basins and that about 67% of the water resources to which Portugal has access come from them. If there is a certain degree of certainty that climate change could promote profound changes in the environment and human life in the near future, there has been a lack of concrete interventions, policies and investments in Portugal in recent decades. To reduce the expected impacts and to promote a gradual adaptation to a new set of contingencies. Given the profound Fecha de recepción del original: 17 de febrero de 2017. Fecha de aceptación de la versión final: 9 de junio de 2017 * Profesor Asistente de Relaciones Internacionales, Universidad de Évora (Portugal). Correo electrónico: mabm@uevora.pt ** Oficial da Guarda Nacional Republicana, Portugal. Correo electrónico: ct.stb@gnr.pt [33] REVISTA ELECTRÓNICA DE ESTUDIOS INTERNACIONALES (2017) 2 DOI: 10.17103/reei.33.11 impact that the reduction in access to fresh water can have in Portugal and constituting National Security, one of the ends of the State, and is therefore a basic foundation of sovereignty and the guarantee of permanence, it becomes essential, to find out, if the water dependence of Portugal constitutes a concrete threat to his National Security and to what degree it can be mitigated. PALABRAS CLAVE: gestión recursos hídricos, alteraciones climáticas, Portugal, Península Ibérica,

La dependencia hídrica de Portugal respecto a España: Cuestiones de política y seguridad