Formas litorales en la costa noroccidental gallega: los sectores acantilados entre Cabo Prioriño (Ferrol) y Punta Frouxeira (Valdoviño)

Chao, Ramón; Alberti, Augusto Pérez

doi:10.26754/ojs_geoph/geoph.1996331708

Cited by 2 publications

(1 citation statement)

References 8 publications

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“…In general terms, the first studies on rocky coasts, performed only a few decades ago, focused on describing study areas by analyzing topographic maps and field surveys [18,19]. These works provided a first approach to the landscape of these areas and an interpretation of their possible evolution.…”

Section: Introductionmentioning

confidence: 99%

The Use of UAVs for the Characterization and Analysis of Rocky Coasts

Gómez‐Pazo

Pérez‐Alberti

2021

Drones

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Rocky coasts represent three quarters of all coastlines worldwide. These areas are part of ecosystems of great ecological value, but their steep configuration and their elevation make field surveys difficult. This fact, together with their lower variation rates, explains the lower numbers of publications about cliffs and rocky coasts in general compared with those about beach-dune systems. The introduction of UAVs in research, has enormously expanded the possibilities for the study of rocky coasts. Their relative low costs allow for the generation of information with a high level of detail. This information, combined with GIS tools, enables coastal analysis based on Digital Models and high spatial resolution images. This investigation summarizes the main results obtained with the help of UAVs between 2012 and the present day in rocky coastline sections in the northwest of the Iberian Peninsula. These investigations have particularly focused on monitoring the dynamics of boulder beaches, cliffs, and shore platforms, as well as the structure and function of ecosystems. This work demonstrates the importance of unmanned aerial vehicles (UAVs) for coastal studies and their usefulness for improving coastal management. The Galician case was used to explain their importance and the advances in the UAVs’ techniques.

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Section: Introductionmentioning

confidence: 99%

The Use of UAVs for the Characterization and Analysis of Rocky Coasts

Gómez‐Pazo

Pérez‐Alberti

2021

Drones

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Tracking the behavior of rocky coastal cliffs in northwestern Spain

2021

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Rocky coastal regions are often inaccessible due to steep slopes and high relief. Remotely sensed data can, therefore, be useful, but they often have low spatial and temporal resolution and, in the case of airborne LiDAR, if not publically available, are costly to obtain. This paper reports on the use of high-resolution images from unmanned aerial vehicles (UAVs) and Structure-from-Motion (SfM) photogrammetric techniques, supplemented by a series of orthophotos and aerial LiDAR, to examine changes in rocky coastal cliffs from 2002 to 2018. The study was conducted over an 800 m-long, orthogneiss-dominated coastal section in northwestern Galicia, Spain. Cliff changes are due, primarily, to rockfalls, resulting from weathering and wave undercutting, which cause talus deposits to accumulate at the cliff foot. These deposits provide temporary protection to the cliff from wave action, until destabilized and removed by wave erosion and shallow landslides. Cliff recession rates are affected by changing conditions within a cycle and are dependent, in part, on when a survey is conducted. The data suggest that rates of cliff recession are increasing in this region and that the plan shape of the coast, which consists of headlands and bays, is continuing to evolve. Most coastal landslides in this region help to transport and dispose of talus fallen from the cliff. In contrast to landslides that remove intact materials from the cliff face, and are, therefore, primary erosional mechanisms, talus landslides are triggered by wave erosion and probably simultaneously, by storm wave spray and splash, rather than by heavy rainfall.

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Formas litorales en la costa noroccidental gallega: los sectores acantilados entre Cabo Prioriño (Ferrol) y Punta Frouxeira (Valdoviño)

Cited by 2 publications

References 8 publications

The Use of UAVs for the Characterization and Analysis of Rocky Coasts

The Use of UAVs for the Characterization and Analysis of Rocky Coasts

Tracking the behavior of rocky coastal cliffs in northwestern Spain

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