| CATCHMENT-WIDE ANALYSIS OF THE SEDIMENT REGIME WITH RESPECT TO RESERVOIR SEDIMENTATION |
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| 作者姓名： | Helmut M. HABERSACK Konrad BOGNER Josef SCHNEIDER and Michael BRAUNER |
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| 作者单位： | Helmut M. HABERSACK1，Konrad BOGNER1，Josef SCHNEIDER1 and Michael BRAUNER2 1Department of Water Management，Hydrology and Hydraulic Engineering，University of Agricultural Sciences Vienna，Muthgasse 18，1190 Vienna，Austria. 2Department of Forest and |
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| 基金项目： | the EC under contract number ENV-CT98-0989 |
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| 摘 要： | 1 INTRODUCTIONIn Anstria reservoirs are frequentiy multi-purpose schemes, being used for power generation, floodprotechon and for wate suPPly downstream. These reservoirs have some adVerse imPaCts on theenvironment around the reservoir and also on the dOwnstream pat:. in rivers with mean annual discharge above 30 m3ls about 36 % of the total length of l884 lQn isimpounded, and only 35% remains as free flowing sections (Muhar, l992),. flooding has been, and continues to be, a serious pr…
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CATCHMENT-WIDE ANALYSIS OF THE SEDIMENT REGIME WITH RESPECT TO RESERVOIR SEDIMENTATION |
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| Helmut M. HABERSACK,Konrad BOGNER,Josef SCHNEIDER and Michael BRAUNER .CATCHMENT-WIDE ANALYSIS OF THE SEDIMENT REGIME WITH RESPECT TO RESERVOIR SEDIMENTATION[J].International Journal of Sediment Research,2001,16(2). |
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| Authors: | Helmut MHABERSACK Konrad BOGNER Josef SCHNEIDER Michael BRAUNER |
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| Abstract: | The aim of this paper is to discuss a catchment-wide approach for analysing the sediment regime with respect to reservoir sedimentation, based on the Alpine Solk-basin in Austria. On a scaling perspective the boundary conditions and major processes of a catchment, like the geomorphological setting, axe given by longterm developments. On the basis of field mapping these effects are discussed with respect to sediment availability, being affected e.g. by deep-seated gravitational slope deformations and slope creeping. Within these longterm processes, short-term unsteady sediment supply, erosion, transfer, deposition and remobilization processes determine reservoir sedimentation and management. An intensive field monitoring program, including bedload and suspended sediment measurements, supplies data for the subsequent rainfall-runoff-erosion and sediment transport modeling (input, calibration and validation data). Instead of aiming to predict sediment transport processes in a purely deterministic manner the use of stochastic concepts allows to define locations in the catchment with a high probability for delivering significant amounts of sediments to the channels and finally the reservoir. Results show that landuse, channel regulation and avalanches are of great importance for sediment supply and that catchment management (beside managing the reservoir itself) has to address these. |
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| Keywords: | Reservoir sedimentation Erosion modeling Sediment load Watershed management |
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