Browsing by Subject "sediment yield"

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    Erosión y desertificación.-Efectividad de los proyectos de restauración hidrológico forestal para el control de la erosión en cuencas mediterráneas
    Castillo, V. M.; Boix Fayos, C.; De Vente, J.; Martinez-Mena, M.; Barberá, G. G.; Universidad de Murcia
    RESUMEN Extensive land use changes have occurred in many Mediterranean catchments as a result of reforestation and the abandonment of agricultural activities. Besides this, the establishment of check-dams has been promoted to reduce soil erosion and sediment transport. In this study a combination of field work, mapping and modelling was used to test the influence of land use scenarios with and without sediment control structures on sediment yield at catchment scale. Model simulation shows that in a scenario without check-dams, the land used changes between 1956 and 1997 caused a progressive decrease in sediment yield of 54%. In a scenario without land use changes but with check-dams, about 77% of the sediment yield was retained behind the dams. Both land use changes and check-dams are effective measures decreasing sediment yield in catchment, however they act at very different temporal scales. Land use changes are long-term sustained sediment control measures compared with check-dams, which are short-term effective sediment control measures.
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    Modelización en Geografía Física.-Hydrology in a Mediterranean mountain environment, the Vallcebre Research Basins (North Eastern Spain). IV. Testing hydrological and erosion models
    Gallart, F.; Latron, J.; Llorens, P.; Martínez-Carreras, N.
    ABSTRACT Three modelling exercises were carried out in the Vallcebre research basins in order to both improve the understanding of the hydrological processes and test the adequacy of some models in such Mediterranean mountain conditions. These exercises consisted of i) the analysis of the hydrological role of the agricultural terraces using the TOPMODEL topographic index, ii) the parameterisation of TOPMODEL using internal basin information, and iii) a test of the erosion model KINEROS2 for simulating badlands erosion.