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Fluvial adjustments to soil erosion and plant cover changes in the central Spanish Pyrenees

AutorBeguería, Santiago ; López-Moreno, Juan I. ; Gómez-Villar, Amelia; Rubio, Virginia; Lana-Renault, Noemí ; García-Ruiz, José María
Palabras clavefluvial adjustments
sediment yield
fluvial incision
farmland
Fecha de publicaciónsep-2006
EditorJohn Wiley & Sons
CitaciónGeografiska Annaler: Series A, Physical Geography 88 (3): 177-186 (2006)
ResumenUntil the middle of the 20th century, Pyrenean rivers were characterized by braided channels, unstable sedimentary structures and an almost complete lack of plant cover in the alluvial plain, due to the high sediment yield in hillslopes and the occurrence of frequent and intense flooding. This was probably related to strong demographic pressures, including the cultivation of steep slopes, frequent fires, deforestation and overgrazing. Depopulation and farmland abandonment resulted in plant recolonization in formerly cultivated areas, causing a decrease in runoff and sediment yield. As a consequence, most Pyrenean rivers tend to reduce the width of the alluvial plain and to replace the braided pattern with an incised, somewhat meandering pattern, involving the construction of new terrace levels and the stabilization of fluvial bars.
Descripción23 Pag., 1 Tabl., 5 Fig., 1 Phot. The definitive version is available at: www3.interscience.wiley.com
Versión del editorhttp://www3.interscience.wiley.com/cgi-bin/fulltext/118596679/PDFSTART
URIhttp://hdl.handle.net/10261/21186
DOI10.1111/j.1468-0459.2006.00293.x
ISSN0435-3676
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