Multivariate Flood Frequency Analysis in Large River Basins Considering Tributary Impacts and Flood Types

In contrast to the basic assumption of a homogeneous population underlying common approaches flood frequency analysis, events often arise from different runoff-generating processes. many large river basins, diversity these processes within tributary basins and superposition their waves increase complexity statistical modeling. Under circumstances, allocation most effective protection measures requires spatially explicit analysis flood-generating determination probability downstream scenarios. For scenarios are derived using individual historical floods along with model-based simulations. We, instead, performed hydrograph-based flood-type classification volume-based runoff analyses for Upper Danube River estimate contributions subbasins at locations. Using this information, we generated long synthetic samples peak-volume-pairs apply multivariate flood-frequency model that yields conditional peak given peaks in stations. The results show only certain combinations types may result extreme confluences. They also highlight need distinguish runoff-generation mechanisms larger ones drive smaller, more frequent events. Through an example Rhine River, demonstrate how can be generalized complex networks featuring several Finally, design assigned probabilities derived, approach used possible climate impacts frequency.