Author(s): M. Peviani & J. Alterach
This paper describes the basis of a morphodynamic mathematical GIS integrated
model (GIS MORIMOR), for non-uniform grain-size sediments which is
employed for the computations of sediment transport capacity and bottom
changes, at catchment basin scale and for short and long-term events.
present model the water flow equations are solved together with the sediment
equations in a quasi-coupled way, by means of a predictor-corrector numerical
Furthermore, a pilot application is described using the model for the
simulation of the morphological effects in the Frodolfo River due to upstream
reservoir flushing operations, in Valtellina (Italy).
GIS, numerical modelling, sediment transport, river morphology,
hydrodynamic simulation, erosion, deposition, reservoir sediment management.
Alpine reservoirs are major and vital components of water supply, renewable
energy generation, recreation and flood protection for mountainous regions as
well as downstream piedmont areas.
Due to sediment transport processes in the basin, originated in the surface
erosion processes and large mass movements (bank erosion, debris flows, etc.),
mountainous reservoirs commonly have to deal with a considerable
To guarantee the correct operation of the system, the sediment
trapped inside the reservoir might be flushed to the downstream rivers.
transport capacity, suspended sediment concentrations and morphological
Size: 801 kb
Paper DOI: 10.2495/RM050531
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