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Título

Effectiveness and geomorphological impacts of check dams for soil erosion control in a semiarid Mediterranean catchment: El Cárcavo (Murcia, Spain)

AutorCastillo Sánchez, Victor Manuel; Moscha, W. M.; Conesa García, C.; González Barberá, Gonzalo ; Navarro-Cano, J. A. ; López-Bermúdez, F.
Palabras claveCheck dams
Ephemeral streams
Fluvial erosion
Sedimentation
Land degradation
Fecha de publicación1-ago-2007
EditorElsevier
CitaciónCatena 70(3): 416-427 (2007)
ResumenThe construction of transverse structures (check dams) is a widely used method in Spanish Mediterranean areas to stabilise gullies and ephemeral streams, to reduce channel incision and to prevent sediment deposition downstream. The effectiveness of check dams and their effects on the morphology of ephemeral channels (ramblas) were investigated in a semiarid, highly degraded catchment. In the study area, 36 dams were surveyed, of which 29 were filled up with sediments, 2 had been destroyed and only 5 had still not completely filled with sediments. The streams above the dams held sediments, which resulted in a decrease in the longitudinal gradient. Field observations of changes in the cross-sectional shape of the stream channel, the composition of channel bed material, and bankfull stage measurements indicated that the dams cause erosion downstream. The amount of sediments stored by the dams was found to be higher than the amount of eroded material in the downstream reaches of the dam.
Versión del editorhttp://dx.doi.org/10.1016/j.catena.2006.11.009
URIhttp://hdl.handle.net/10261/16296
DOI10.1016/j.catena.2006.11.009
ISSN0341-8162
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