Monitoring the dune-beach system of Guardamar del Segura (Spain) using UAV, SfM and GIS techniques
| Autor: | Luis Bañón, Isabel López, José Ignacio Pagán, Carlos Bañón, Luis Aragonés |
|---|---|
| Přispěvatelé: | Universidad de Alicante. Departamento de Ingeniería Civil, Ingeniería del Transporte, Territorio y Medio Litoral (AORTA), Ingeniería del Terreno y sus Estructuras (InTerEs) |
| Rok vydání: | 2019 |
| Předmět: |
Foredune
Environmental Engineering Geographic information system Geospatial analysis 010504 meteorology & atmospheric sciences Dune erosion UAV Ingeniería e Infraestructura de los Transportes 010501 environmental sciences computer.software_genre 01 natural sciences Shoreline evolution Environmental Chemistry Structure from motion Digital elevation model Waste Management and Disposal 0105 earth and related environmental sciences Remote sensing business.industry DEM GIS Pollution Coastal erosion Photogrammetry SfM Erosion Environmental science business computer |
| Zdroj: | RUA. Repositorio Institucional de la Universidad de Alicante Universidad de Alicante (UA) |
| ISSN: | 0048-9697 |
| DOI: | 10.1016/j.scitotenv.2019.06.186 |
| Popis: | Dune ecosystems play a key role in coastal dynamics, so it is essential to measure their movements with high precision and monitor their changes over time. It is crucial to have a system that allows us to know the natural and anthropic impacts affecting these ecosystems. The aim of this study is to ascertain the historical evolution of the dune system of Guardamar del Segura (Spain) and its relationship with coastal erosion. Likewise, it is also intended to assess the state of the foredune restoration works carried out in 2011. To this end, a comparison of existing cartographic data has been undertaken by using geospatial analysis techniques through Geographic Information Systems (GIS). As a novelty, a low takeoff weight UAV (Unmanned Aerial Vehicle) has been used to produce a high-precision 3D model from two-dimensional images using photogrammetric techniques, such as Structure from Motion (SfM). This technique made it possible to obtain a digital terrain model of high density and precision (30 pt/m2 and RMSE Z of 0.173 m). The results show a constant erosion of both the beach and the foredune, with an overall loss of 143,561 m3 of material in the period analyzed (2001–2017). The anthropogenic restoration actions executed within this period have not been effective. In fact, erosion has increased in the period 2016–2017, with a significant reduction in the beach width and sea waves directly affecting the foredune. The main conclusion is that the combined use of UAV and SfM techniques is an excellent procedure to periodically supervise dune ecosystems with high precision and significant time and cost savings. |
| Databáze: | OpenAIRE |
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