Paleoflood hydrology and related environmental changes of a mediterranean rambla (Castellón, NE Spain)
| Autor: | Machado, María José, Medialdea, Alicia, Rico, María Teresa, Sánchez Moya, Yolanda, Sopeña, Alfonso, Benito, Gerardo |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| Popis: | Trabajo presentado en el 5th PAGES Open Science Meeting, celebrado en Zaragoza (España), del 9 al 13 de mayo de 2017 Rambla de la Viuda (drainage area of 1500 km2 ) is a Mediterranean ephemeral river with a hydrological regime characterised by large floods. The region has a long history of anthropogenic land-use changes, which contributed to temporal phases of increased rates of sediment yield and changes in flood hydrology. Valley sides revealed important accumulations of slackwater flood deposits. These slackwater flood deposits emplaced by high stage floodwaters show a complete stratigraphy from which we can reconstruct long-term records of floods and environmental changes. Interbeded with these flood units, colluvial units can be observed, and several edaphic horizons developed on colluvial and fluvial deposits were identified. The alluvial and colluvial chronostratigraphical, sedimentological and palaeobotanical (phytoliths) analysis of these units, together with the hydraulic flood modelling approach, made possible to determine: a) the way in which hydrological extreme events may be changing both in frequency and intensity as a result of climate variability, b) the weight of human influence (land-use) on soil hydrology, c) geomorphic channel changes, and c) human/climatic induced changes on landcover during this temporal scale (last 500 yrs). |
| Databáze: | OpenAIRE |
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