Observatorio de I+D+i UPM

Memorias de investigación
Artículos en revistas:
The Ebro River in the 20th century or the ecomorphological transformation of a large and dynamic Mediterranean channel
Año:2012
Áreas de investigación
  • Geomorfología
Datos
Descripción
In the first decades of the 20th century, the Ebro River was the Iberian channel with the most active fluvial dynamics and the most remarkable spatial-temporal evolution. Its meandering typology, the dimensions of its floodplain, and the singularities of its flow regime produced an especially interesting set of river functions. The largest dynamics of the Ebro River are concentrated along the meandering profile of the central sector. During the 20th century, this sector experienced a large alteration of its geomorphological structure. We present here an analysis of this evolution through the cartographic study of a long segment of the river (~250?km) in 1927, 1956 and 2003. The results show a large reduction in bank sinuosity, a progressive loss of fluvial territory, and a large decrease in channel width. These changes are especially clear in the areas previously most ecologically connected with the active channel. The fluvial territory of the river in 2003 was approximately half that found during the first decades of the 20th century. Forest plantations, which were non-existent in 1927, occupied more than 1500?ha of the study area in the last decade. This intense geomorphological transformation becomes ecologically visible in (i) a 35% reduction of the area occupied by riparian vegetation; (ii) a loss of the heterogeneity of riparian forest spots, which were formerly structured in an irregular mosaic far from the river thalweg; and (iii) a modification of the riparian forest structure, which is currently linear, uniform, thin and very close to the river axis. The ecomorphological alteration was intensified by the remarkable reduction in bank length (13%) and the reduced dynamism of the present river system, indicated by an increase in the percentage of fluvial territory occupied by riparian forests and a reduction in the area occupied by the active channel.
Internacional
Si
JCR del ISI
Si
Título de la revista
Earth Surface Processes and Landforms
ISSN
1096-9837
Factor de impacto JCR
2,111
Información de impacto
ISI Journal Citation Reports
Volumen
37
DOI
10.1002/esp.2258
Número de revista
5
Desde la página
486
Hasta la página
498
Mes
ABRIL
Ranking
Ranking: 2010: 15/42 (Geography Physical); 44/165 (Geosciences Multidisciplinary)
Esta actividad pertenece a memorias de investigación
Participantes
  • Autor: Fernando Magdaleno (CEDEX)
  • Autor: Jose Anastasio Fernandez Yuste (UPM)
  • Autor: Silvia Merino De Miguel (UPM)
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Grupo de Investigación: Hidrobiología
  • Departamento: Construcción y Vías Rurales
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