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Title: Geomorphological changes in an arid transgressive coastal dune field due to natural processes and human impacts
Authors: Hernández-Cordero, Antonio I. 
Hernández-Calvento, Luis 
Hesp, Patrick A.
Perez-Chacon Espino, María Emma 
UNESCO Clasification: 250501 Biogeografía
2511 Ciencias del suelo (Edafología)
Keywords: Aeolian sedimentary landforms
Geomorphological and environmental changes
Spatio-temporal dynamics
Urban tourist
Issue Date: 2018
Project: Modelización de Los Procesos Naturales y Análisis de Las Consecuencias Ambientales Inducidas Por El Turismo en la Reserva Natural Especial de Las Dunas de Maspalomas (Gran Canaria, Islas Canarias). 
Consecuencias Ambientales Inducidas Por El Desarrollo Turistico en Espacios Insulares: Alteraciones de Los Procesos Naturales en Sistemas de Dunas Litorales de Canarias y Cabo Verde. 
Diagnóstico Ambiental de Los Sistemas de Dunas de Canaris Para la Elaboración de Modelos Sostenibles 
Caracterización de Procesos Socio-Ecológicos de Los Sistemas Playa-Dunas de Canarias Como Base Para Su Gestión Sostenible 
Análisis de Procesos Naturales y Humanos Asociados A Los Sistemas Playa-Duna de Canarias 
Journal: Earth Surface Processes and Landforms 
Abstract: Geomorphological changes in recent decades in an arid transgressive coastal dune system (Maspalomas, Gran Canaria, Canary Islands) are analyzed. The methodology used is based on the generation of two geomorphological maps (1961 and 2003) by interpretation of digital orthophotos. The overlay of both maps in a geographic information system (GIS) enabled the spatial and surface changes of the landforms to be determined, and the processes that generated these changes. Twelve cultural and geomorphological processes were identified from highest to lowest importance, namely: anthropization by urban occupation (114ha changed), stabilization (92.5ha), barchanization (37ha), salinization/halophytication (15ha), anthropization (12.4ha), deflation (11.8ha), dune loss/beach gain (11.3ha), dune formation (9.6ha), progradation (8ha), retrogradation (7.7ha), destabilization (2.7ha) and flooding (0.7ha). Geomorphological changes are associated with a combination of five main factors, three of anthropogenic origin and two natural ones. The natural factors are: (1) the arid climate, which favors changes occurring at high speed; (2) the existence of a progressive sedimentary deficit. Anthropogenic factors are: (3) construction of tourist urbanizations, infrastructures and facilities; (4) installation of equipment or infrastructure on the beaches; (5) the activities carried out by users. These human factors have altered the aeolian dynamics and reduced the area occupied by vegetation in some areas, causing changes in aeolian sedimentary processes. The geomorphological processes identified can be used as indicators of environmental change, allowing us to synthesize the changes in landforms detected, and group all combinations derived from the analysis by GIS and analyze them spatially. Thus, the environmental changes in the transgressive coastal dune systems could be interpreted more effectively.
ISSN: 1096-9837
DOI: 10.1002/esp.4382
Source: Earth Surface Processes and Landforms[ISSN 1096-9837],v. 43, p. 2167-2180
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