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Datación de avenidas torrenciales y flujos de derrubios mediante metodologías dendrogeomorfológicas (barranco de Portainé, Lleida, España).

Authors: García Oteyza, J.; Génova, Mar; Calvet i Porta, Jaume; Furdada i Bellavista, Glòria; Guinau Sellés, Marta; Díez-Herrero, Andrés;

Datación de avenidas torrenciales y flujos de derrubios mediante metodologías dendrogeomorfológicas (barranco de Portainé, Lleida, España).

Abstract

La dendrogeomorfología resulta una herramienta muy útil en el análisis científico-técnico de las avenidas y flujos de derrubios en torrentes de alta montaña, en los que las fuentes de datos convencionales (caudales o precipitaciones) son escasas o inexistentes y presentan una cierta problemática social. El barranco de Portainé, en cuya cabecera se sitúa la estación de esquí homónima de Port Ainé (Lleida, España), cumple estas características. Fenómenos erosivos y deposicionales asociados, sobre todo, a períodos de lluvias intensas de verano, afectan periódicamente a la carretera de acceso a la estación de esquí, que atraviesa el barranco en varios puntos, con las consiguientes pérdidas económicas y potenciales daños personales y a los servicios. Con este trabajo se pretende estimar, mediante técnicas dendrogeomorfológicas, el número y la distribución temporal de avenidas y flujos torrenciales en el barranco, para conocer si las interacciones antrópicas en la red hidrográfica, asociadas a la apertura y operación de la estación de esquí y los accesos a la misma, pueden haber modificado su frecuencia y magnitud. Se han muestreado principalmente aquellos ejemplares arbóreos que presentaban daños externos manifiestos, originados por el impacto de los materiales arrastrados por las avenidas. Además se ha realizado un detallado estudio geomorfológico y se han recopilado los datos históricos disponibles. Con toda esta información se ha generado una base de datos de eventos pretéritos de avenidas para un periodo de 50 años, en la que se ha determinado un incremento significativo de estos eventos en las últimas décadas.

Country
Spain
Related Organizations
Keywords

Environmental sciences, Pyrénées-Orientales (France), GE1-350, Geomorphology, Geomorfologia, Pirineus Orientals (França)

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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.
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influence
This indicator 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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impulse
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