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Cuaternario y Geomorfología
Article . 2018 . Peer-reviewed
Data sources: Crossref
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Interpretación y cartografía de paleolíneas de costa lacustres mediante fotografías aéreas de alta resolución y datos LiDAR en la laguna de Gallocanta (NE España)

Authors: Carmen Castañeda del Álamo; Francisco Javier Gracia Prieto;

Interpretación y cartografía de paleolíneas de costa lacustres mediante fotografías aéreas de alta resolución y datos LiDAR en la laguna de Gallocanta (NE España)

Abstract

La laguna de Gallocanta, de 14 km2 de extensión, se localiza entre las provincias de Zaragoza y Teruel. Sufre frecuentes fluctuaciones del nivel de agua, que oscilan entre la desecación total y un máximo de casi 3 m de profundidad. Está expuesta a vientos fuertes y persistentes del NO, que originan oleaje, corrientes y transporte de sedimentos a lo largo de litorales donde son habituales las playas, flechas, cordones y otras formas costeras. La identificación de antiguos cordones litorales del Pleistoceno Superior en canteras situadas en la zona perilagunar, sugiere una extensión mucho mayor del ámbito lacustre en pocas pasadas, alcanzando al menos 45 km2 de lámina de agua, ubicada a más de 15 m de altura por encima del fondo actual. Las llanuras perilacustres existentes entre dichos cordones y la laguna actual albergan registros morfosedimentarios de paleolíneas de costa de tiempos holocenos e históricos. Dada la gran dificultad de reconocer estas morfologías relictas mediante métodos tradicionales, se emplearon dos fuentes de información: fotografías aéreas de alta resolución (1:15.000) y un modelo digital del terreno generado con datos LiDAR con una precisión de 0,2 m. Se analizó la topografía de forma continua extrayendo las curvas de nivel, para obtener una interpretación topográfica de alta precisión. Posteriormente, se integraron los resultados, operando en entorno SIG, y se realizó una inspección de campo. Como resultado se ha obtenido una serie de secuencias de formas litorales relictas escalonadas que rodean completamente la laguna actual con gran continuidad lateral. Se han identificado unos 10 niveles relictos, algunos de ellos con espectaculares formas litorales bien conservadas como flechas con ganchos recurvados, contraflechas, bahías cerradas por islas barrera, sistemas de barras paralelas, paleodeltas, etc. Estas formas permiten una reconstrucción inicial de la dinámica litoral dominante en tiempos pasados.

Keywords

Lacustrine terraces, MDE, Lake margin, cartografía, DEM, litoral, Artículos de Investigación, fotointerpretación, Photointerpretation, terrazas lacustres, Shoreline mapping, líneas de costa, Cartografía

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selected citations
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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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