The Most Meridional Border in Europe. Demographic and Environmental Changes

Between 38°50?30"N/7° 04'35 W and 37°10?13"N/7°23?38"W has located the southernmost border of Europe, which stands apart from Portugal and Spain, which separates part of Portugal and Spain, making it one of the furthest from the central European area. A feature of this Spanish-Portuguese border stretch is that it is closely linked to the Guadiana River, one of the major waterways that cross the Iberian Peninsula from east to west. In 1998, the Albufeira Convention was signed, promoting Iberian cooperation at a scientific and technical level to strengthen the links of communication and collaboration at the technical level - the challenge of shared management of the waters and international basins that affect both countries. The Convention presented challenges and objectives on which the competent administrations have been working since then. Another peculiarity of this territory, except in a few situations, is its low population density. Therefore, knowing the demographic and environmental changes of the municipalities bordering the 'Raya' (common name as the border is known in these areas) constitutes valuable information that leads to the territorial management of these peripheral areas.