Abstrakt
The montane streams represent highly dynamic water courses with fast runoff response on precipitation events. The consequences of rainfall-runoff processes are remaining within the channel in the form of changing morphology.
The dramatic changes can be expected even with return period of one year. The study represents an application of the theoretical concepts of sediment transport initialization phase within an integrated numerical modelling system at the local scale.
The causal flow parameters of gravel remobilization as results of the hydrodynamic simulations were explored within two fluvial-morphological simulation sets. First the conventional grain size parameter D50 was used within the event based reconstruction of the largest recorded flood in July 2013.
Further the grain distribution frequency was discretized within the percentile classes that entered the model setup separately. Results of the discretization were analysed by the so called remobilization rating curves, designed and constructed as a tool for the remobilization competence evaluation.