Abstract
The proposed model was based on the streamflow partial duration series (PDS). Both the occurrence time and the magnitude of the floods (instantaneous hydrograph peaks) were time-dependent random variables. An estimation method, based on the maximum likelihood concept, was also proposed. The derivation of the law of extremes from the basic model showed the strong influence of the time-dependence assumptions on the extreme values. Application of the model to a 38-yr series of floods on the Melezza River at Camedo, Ticino (Southern Switzerland), showed good agreement between theoretical and observed values. (Sims-ISWS)
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