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Quality control,validation and user feedback of the European Flood Alert System(EFAS)

International Journal of Digital Earth 2011年第S1期4卷 77-90页

作者： Ad De Roo Jutta Thielen Peter Salamon konrad bogner Sebastien Nobert Hannah Cloke David Demeritt Jalal Younis Milan Kalas Katalin Bodis Davide Muraro Florian Pappenberger European Commission Joint Research Centre(JRC)IspraItaly European Centre for Medium Range Weather Forecast(ECMWF) ReadingUK Department of Geography King’s College LondonLondonUK Czech Hydrometeorological Institute PragueCzech Republic

The quality control,validation and verification of the European Flood Alert System(EFAS)are *** is designed as a flood early warning system at pan-European scale,to complement national systems and provide flood warnings more than 2 days before a *** average 2030 alerts per year are sent out to the EFAS partner network which consists of 24 National hydrological authorities responsible for transnational river *** control of the system includes the evaluation of the hits,misses and false alarms,showing that EFAS has more than 50%of the time ***,the skills of both the meteorological as well as the hydrological forecasts are evaluated,and are included here for a 10-year ***,end-user needs and feedback are systematically *** improvements,such as real-time river discharge updating,are currently implemented.

关键词： flood warning forecasting EFAS probabilistic skill

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CATCHMENT-WIDE ANALYSIS OF THE SEDIMENT REGIME WITH RESPECT TO RESERVOIR SEDIMENTATION

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International Journal of Sediment Research 2001年第2期16卷 159-169页

作者： 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 Department of Water Management Hydrology and Hydraulic Engineering University of Agricultural Sciences Vienna Muthgasse 18 1190 Vienna Austria Department of Forest and Mountain Risk Engineering University of Agricultural Sciences Vienna Pater Jordanstrasse 82 1190 Vienna Austria

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.

关键词： Reservoir sedimentation Erosion modeling Sediment load Watershed management

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