An update on multivariate return periods in hydrology
1Institute of Hydrology, Ruhr University Bochum, Bochum, Germany
2Dipartimento di scienze agrarie e forestali (DAFNE Department),
University of Tuscia, Tuscia, Italy
3Dipartimento per la innovazione nei sistemi biologici agroalimentari e forestali (DIBAF Department), University of Tuscia, Tuscia, Italy
4Department of Mathematical Modelling, Statistics and Bioinformatics, Ghent University, Ghent, Belgium
5Laboratory of Hydrology and Water Management, Ghent University, Ghent, Belgium
Abstract. Many hydrological studies are devoted to the identification of events that are expected to occur on average within a certain time span. While this topic is well established in the univariate case, recent advances focus on a multivariate characterization of events based on copulas. Following a previous study, we show how the definition of the survival Kendall return period fits into the set of multivariate return periods.
Moreover, we preliminary investigate the ability of the multivariate return period definitions to select maximal events from a time series. Starting from a rich simulated data set, we show how similar the selection of events from a data set is. It can be deduced from the study and theoretically underpinned that the strength of correlation in the sample influences the differences between the selection of maximal events.
Gräler, B., Petroselli, A., Grimaldi, S., De Baets, B., and Verhoest, N.: An update on multivariate return periods in hydrology, Proc. IAHS, 373, 175-178, doi:10.5194/piahs-373-175-2016, 2016.