Sensitivity Study for a Bed-Load Transport Routing Scheme applied to a large Alpine Catchment

摘要

The work presented attends to a sensitivity analysis of an event based bed-load transport calculation for an alpine catchment in Tyrol. Within a routing scheme transport capacities are calculated according to an approach from Rickenmann (1990). The comparison of parameter sensitivities is based on relative variations between feasible physical parameter limits. Within the study the variation of sedigraphs from different sub catchments is analysed at different flood flow situations. The investigation involves independent as well as combined parameter variations to assess lower and upper bounds of total bed-loads. The results are furthermore compared by using alternative approaches such as those from Meyer-Peter/Müller and Smart/Jaeggi. It is found that there is a broad spectrum of model results although parameters are varied within reasonable physical ranges. Still, the knowledge of variation is important for practitioners using the given approaches.