Airflow Dynamics, Vegetation and Aeolian erosive processes in a shadow zone leeward of a resort in an arid transgressive dune system

Leví García-Romero, Irene Delgado-Fernandez, Patrick A. Hesp, Luis Hernandez-Calvento, Manuel Viera-Pérez, Antonio I. Hernández-Cordero, Jorge Cabrera-Gámez, Antonio C. Domínguez-Brito

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Structures and infrastructures can modify aeolian sedimentary dynamics as has occurred in the arid transgressive dunefield of Maspalomas (Gran Canaria, Canary Islands), where an aeolian shadow zone has been formed leeward of a tourist resort (Playa del Inglés). The aim of this paper is to analyse spatial and statistically the influences of vegetation and topography on wind flow across this shadow zone. An experiment was carried out in March 2017, collecting wind speed and direction from 5 transects with anemometers at 0.40 m height. Simultaneously, a drone flight was carried out, from which an orthophoto and digital elevation and surface models (DEM and DSM) were obtained. Distance from the resort, and the presence of vegetation were found to influence transects dominated by erosional processes. Transects that do not display erosional processes were primarily affected by the presence of vegetation. The local wind field changes at a similar distance across the transects downwind from the resorts indicating an acceleration or reattachment of the wind at this distance downwind. The vegetation role in this aeolian shadow zone could be a key to the future evolution of the area resulting in either further stabilization, or alternatively, the continued deflation of the area.

Original languageEnglish
Pages (from-to)48-59
Number of pages12
JournalAeolian Research
Volume38
DOIs
Publication statusPublished - Jun 2019

Keywords

  • Aeolian shadow zone
  • Arid transgressive dune system
  • Wind flow
  • Dune vegetation
  • Topography
  • Human impact

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