Cambios recientes en la dinámica eólica del sistema de dunas activas del Parque Nacional de Doñana

Recent changes in aeolian dynamics changes in the active dune system at Doñana National Park Dune dynamics has been monitored for two different periods (1956-1977/ 1977-2001) by using photogrammetric data sets and GIS techniques. Analysis include comparison of dune-slacks extensions, dune advance rates and dune topo-volummetric conditions. Results from these mid-term analysis show a reduction of dune ridge areas, a slowing down of dune front advances and a morphological change of dune ridges, by gaining elevation at the crest zone, becoming narrower and modifying windward profile from convex to concave. All these recorded changes are interpreted as indicators of a stabilization process. This process could be considered within a long-term stabilization trend, behind which human action plays a significant role.