Publicación: Extreme wave events in the southeastern Iberia coast: blocks and megablocks as an indicator of tsunamis or extreme storms.
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2017-08
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info:eu-repo/semantics/openAccess
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Sociedad Geológica de España
Resumen
Mientras que la costa SW de la península tiene un registro importante de eventos de oleaje extremo (EOE), la mayoría asociados a tsunamis, la costa mediterránea peninsular ofrece un registro menor de estos eventos, si bien han sido citados algunos tsunamis históricos con pocos efectos en la costa. En general estos estudios se han basado en el registro geológico de secuencias detríticas de arenas y limos. En nuestro caso nos hemos centrado en el estudio de cordones litorales de bloques y megabloques en la zona de Cope, Murcia (SE Peninsular) donde se han localizado bloques mayores de 1 m y a más de 4 msnm, generados por un EOE asociado a tsunamis o grandes tormentas. Mediante el uso de un vehículo aéreo no tripulado (dron) se ha realizado la fotogrametría aérea, completada con terrestre de mayor resolución, y su posterior tratamiento para realizar un modelo 3D del terreno y obtener los parámetros dimensionales y espaciales de estos bloques. Se han utilizado diversos modelos para calcular las alturas de ola de tsunamis y tormentas capaces de generar dichos depósitos (Nott, 2003; Engel y May, 2012). Con los resultados se ha podido confirmar el proceso generador de los cordones de bloques en este escenario.
Whilst the SW coast of the Iberian Peninsula has a significant record of extreme wave events (EWE), mostly associated with tsunamis, the Mediterranean coast offers a smaller record of these events, although some historical tsunamis with limited impact have been cited on the coast. In general, these studies have been based on the geological record of detrital sequences of sands and silts. In this case, we have focused on the study of coastal deposits of blocks and megablocks in Cope, Murcia (SE of Iberian Peninsula). Here, blocks greater than 1 m and located up to 4 masl were generated by an EWE associated to either a tsunamis or great storm. An unmanned aerial vehicle (drone) has been utilized to perform aerial photogrammetry, which complemented terrestrial photogrammetry of higher resolution. This has been processed to develop a 3D model of the terrain and obtain the dimensional and spatial parameters of these blocks. Different models have been used to calculate potential tsunami wave heights and scale of storms capable of generating such deposits (Nott, 2003; Engel and May, 2012). The results confirm the process of generating force required to generate the block ridges at this site.
Whilst the SW coast of the Iberian Peninsula has a significant record of extreme wave events (EWE), mostly associated with tsunamis, the Mediterranean coast offers a smaller record of these events, although some historical tsunamis with limited impact have been cited on the coast. In general, these studies have been based on the geological record of detrital sequences of sands and silts. In this case, we have focused on the study of coastal deposits of blocks and megablocks in Cope, Murcia (SE of Iberian Peninsula). Here, blocks greater than 1 m and located up to 4 masl were generated by an EWE associated to either a tsunamis or great storm. An unmanned aerial vehicle (drone) has been utilized to perform aerial photogrammetry, which complemented terrestrial photogrammetry of higher resolution. This has been processed to develop a 3D model of the terrain and obtain the dimensional and spatial parameters of these blocks. Different models have been used to calculate potential tsunami wave heights and scale of storms capable of generating such deposits (Nott, 2003; Engel and May, 2012). The results confirm the process of generating force required to generate the block ridges at this site.
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Categorías UNESCO
Palabras clave
oleaje extremo, tsunami, tormentas, dron, extreme waves, storm, drone
Citación
Centro
Facultad de Ciencias
Departamento
Ciencias Analíticas
Grupo de investigación
Geología Aplicada al Medio Ambiente (GAMA)