Process-based modelling of erosion, sediment transport and reservoir siltation in mesoscale semi-arid catchments
Axel Bronstert, José-Carlos de Araújo, Ramon J. Batalla, Alexandre Cunha Costa, José Miguel Delgado, Till Francke, Saskia Foerster, et al. Journal of Soils and Sediments ISSN 1439-0108 J Soils Sediments DOI 10.1007/s11368-014-0994-1
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Author's personal copy J Soils Sediments DOI 10.1007/s11368-014-0994-1
ANALYSIS AND MODELLING OF SEDIMENT TRANSFER IN MEDITERRANEAN RIVER BASINS
Process-based modelling of erosion, sediment transport and reservoir siltation in mesoscale semi-arid catchments Axel Bronstert & José-Carlos de Araújo & Ramon J. Batalla & Alexandre Cunha Costa & José Miguel Delgado & Till Francke & Saskia Foerster & Andreas Guentner & José Andrés López-Tarazón & George Leite Mamede & Pedro Henrique Medeiros & Eva Mueller & Damià Vericat
Received: 29 October 2013 / Accepted: 23 September 2014 # Springer-Verlag Berlin Heidelberg 2014
Abstract Purpose To support scientifically sound water management in dryland environments a modelling system has been developed for the quantitative assessment of water and sediment fluxes in catchments, transport in the river system, and retention in reservoirs. The spatial scale of interest is the mesoscale because this is the scale most relevant for management of water and land resources. Materials and methods This modelling system comprises process-oriented hydrological components tailored for dryland characteristics coupled with components comprising hillslope erosion, sediment transport and reservoir deposition
processes. The spatial discretization is hierarchically designed according to a multi-scale concept to account for particular relevant process scales. The non-linear and partly intermittent run-off generation and sediment dynamics are dealt with by accounting for connectivity phenomena at the intersections of landscape compartments. The modelling system has been developed by means of data from nested research catchments in NE-Spain and in NE-Brazil. Results and discussion In the semi-arid NE of Brazil sediment retention along the topography is the main process for sediment retention at all scales, i.e. the sediment delivery is transport limited. This kind of deposition retains roughly 50 to 60 % of
Responsible editor: Rajith Mukundan Electronic supplementary material The online version of this article (doi:10.1007/s11368-014-0994-1) contains supplementary material, which is available to authorized users. A. Bronstert (*) : J. M. Delgado : T. Francke : E. Mueller Department of Hydrology & Climatology, Institute of Earth and Environmental Science, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam-Golm, Germany e-mail:
[email protected] J.
