A quantitative vulnerability function for fluvial sediment transport

摘要: In quantitative risk assessment, is expressed as a function of hazard, elements at exposed, and vulnerability. Vulnerability defined the expected degree loss for an element consequence certain event, following natural-scientific approach combined with economic methods appraisal. The resulting value ranges from 0 (no damage) to 1 (complete destruction). With respect torrent processes, i.e., fluvial sediment transport, this concept vulnerability—though widely acknowledged—did not result in sound relationships between process intensities associated degrees so far, even if considerable occurred during recent years. To close gap establish relationship, data three well-documented events Austrian Alps were used derive vulnerability applicable residential buildings located on fans. method applied followed spatially explicit empirical within GIS environment was based intensities, spatial characteristics risk, average reconstruction values local scale. Additionally, collected responsible administrative bodies analysed object level. results suggest modified Weibull distribution fit best observed damage pattern intensity quantified absolute values, Frechet relatively relation individual building height. uncertainties such studied; quality 90% confidence band found represent range appropriately. relationship obtained allows enhanced quantification but also inclusion comprehensive models including physical, social, economic, institutional As result, mountain hazards might decrease future.