An exploratory analysis on the variability of flood occurrence rates in 10 Portuguese watersheds is made, to ascertain if that variability is concurrent with the principle of stationarity. A peaks-over-threshold (POT) sampling technique is applied to 10 long series of mean daily streamflows and to 4 long series of daily rainfall in order to sample the times of occurrence (POT time data) of the peak values of those series. The kernel occurrence rate estimator, coupled with a bootstrap approach, was applied to the POT time data to obtain the time dependent estimated occurrence rate curves, λ
CITATION STYLE
Silva, A. T., Portela, M. M., & Naghettini, M. (2012). Nonstationarities in the occurrence rates of flood events in Portuguese watersheds. Hydrology and Earth System Sciences, 16(1), 241–254. https://doi.org/10.5194/hess-16-241-2012
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