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Título : Uncertainties in partial duration series modelling of extremes related to the choice of the threshold value
Autor : Beguería, Santiago
Palabras clave : Frequency analysis
Extreme rainfall events
Peaks over threshold
Partial duration series
Threshold value
Generalised Pareto distribution
Threshold stability
Fecha de publicación : mar-2005
Editor: Elsevier
Citación : Journal of Hydrology, Volume 303, Issues 1-4, 1 March 2005, Pages 215-230
Resumen: Partial duration series modelling is a robust tool with which to model hydrologic extremes, but because of several technical problems it remains underused. The most important obstacle is the choice of the threshold value, a matter that is currently under investigation by several authors. The truncation value affects the basic assumptions of the model, including arrival times and exceedance magnitudes. This paper considers changes in parameter and quantile estimates as a function of the threshold value (sampling variability). Simulated and real data were used to test the consistency of the model, and a new modelling procedure based on increasing threshold censoring is proposed to overcome these problems. Poisson arrivals and Generalised Pareto exceedances were assumed, and the suitability of this model at different threshold values has been also addressed.
Descripción : The final version is available at: http://www.sciencedirect.com/science/journal/00221694
URI : http://hdl.handle.net/10261/5248
DOI: 10.1016/j.jhydrol.2004.07.015
ISSN: 0022-1694
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