Return Periods of Hydrological Events: Paper presented at the Nordic Hydrological Conference (Reykjavik, Iceland, Aug-Sep, 1976)

A relation between return periods of hydrological events in annual maxima and partial duration series respectively is shown to be exactly fulfilled when the events take place according to a Poisson process. Furthermore it is shown that the relation can be used as a good approximation when dealing with more regular processes than the Poissonian. Finally a record of rainfall depths is analysed.