Floods recurrence interval

Fig. 17 Weighted frequency of the various process types [64]. Only flood events with a recurrence interval of more than 10 years are considered. These events are weighted as follows A process type which results in an event with a recurrence more than 30 years is accorded the weighting 3. A recurrence of more than 20 but less than 30 years corresponds to a weighting of 2, and a recurrence of more than 10 but less 20 years corresponds to a weighting of 1. The weightings are then aggregated for each process type per catchment...

Analyses of discharge are related to the recurrence interval to produce a flood frequency curve (Fig. 8.10). The recurrence interval is the period of years within which a flood of a given... 

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