Evolución reciente de geoformas erosivas inducidas por impacto urbano-turístico en el interior de un sistema de dunas transgresivo árido (Maspalomas, Islas Canarias)

Translated title of the contribution: Recent evolution of erosive landforms induced by urban-touristic impact inside an arid transgressive dune system

Levi Garcia-Romero, Antonio I Hernández-Cordero, IRENE DELGADO-FERNANDEZ, Patrick A Hesp, Luis Hernandez-Calvento, Manuel Viera-Pérez

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    Abstract

    Urban-tourist developments at beach-dune systems often induce environmental changes. This is the case of Maspalomas dunefield (Gran Canaria, Canary Islands) with one of the largest tourist resorts in Spain. The building of
    an artificial high terrace (El Inglés) from 1960s had a strong impact on local winds and sediment transport patterns. Buildings on the terrace deflect winds to the south and accelerate the rate of sediment transport as a result in the
    southern section of the dune field. Leeward of the terrace wind speed and aeolian transport decrease and vegetation cover and density increase. However, a series of erosive landforms can be identified in the terrace leeside, including
    blowouts and large areas with the exhumation of plant roots (mainly Cyperus capitatus). In this paper we analyze the evolution of these erosive landforms in the last decades using historical aerial photographs, orthophotos and digital
    elevation models obtained by digital photogrammetry and LiDAR. Changes in two environmental variables (sediment volume and vegetation density) are calculated. Results indicate a deficit in sediment supply and increase in vegetation density in the active residual zone. We discuss eco-anthropic factors that have produced these environmental changes and the characteristics of the Maspalomas erosive landforms compared to other climatic regions.
    Translated title of the contributionRecent evolution of erosive landforms induced by urban-touristic impact inside an arid transgressive dune system
    Original languageSpanish
    Title of host publicationGeo-Temas
    PublisherSociedad Geologica de Espana
    Pages263-266
    Volume17
    ISBN (Print)1576-5172
    Publication statusPublished - 13 Sep 2017
    EventIX Jornadas de Geomorfologia Litoral - Menorca, Spain
    Duration: 13 Sep 201715 Sep 2017

    Conference

    ConferenceIX Jornadas de Geomorfologia Litoral
    Country/TerritorySpain
    CityMenorca
    Period13/09/1715/09/17

    Keywords

    • cambios ambientales
    • sistema de dunas transgresivo árido
    • vegetación dunar
    • impactos humanos
    • blowout

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