Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1029/2011WR010515
Titel (primär) Extreme rainstorms: comparing regional envelope curves to stochastically generated events
Autor Viglione, A.; Castellarin, A.; Rogger, M.; Merz, R.; Blöschl, G.
Quelle Water Resources Research
Erscheinungsjahr 2012
Department CATHYD
Band/Volume 48
Seite von W01509
Sprache englisch

The depth-duration envelope curves (DDECs) are regional upper bounds on observed rainfall maxima for several durations. Recently, a probabilistic interpretation has been proposed in the literature in order to associate a recurrence interval T to the DDECs and, consequently, to retrieve point rainfall quantiles for ungauged sites. Alternatively, extreme rainfall quantiles can be retrieved from long synthetic rainfall series obtained with stochastic rainfall generators calibrated to local time series of rainfall events. While DDECs are sensitive to outliers and data errors, the stochastic rainfall generator performance is affected by the limited record lengths used for calibration. The objective of this study is to assess the reliability of the two alternative methods by verifying if they give consistent results for a wide study region in Austria. Relative to previous studies, we propose some generalizations of the DDEC procedure in order to better represent the Austrian data. The comparison of rainfall quantiles estimated with the two methods for large T shows an excellent agreement for intermediate durations (from 1 to 6 h), while the agreement worsen for very short (15 min) and long (24 h) durations. The results are scrupulously analyzed and discussed in light of the exceptionality of rainfall events that set the regional envelopes and the characteristics of the stochastic generator used. Our study points out that the combined use of these regional and local methods can be very useful for estimating reliable point rainfall quantiles associated with large T within regions where many rain gauges are available, but with limited record lengths.
dauerhafte UFZ-Verlinkung
Viglione, A., Castellarin, A., Rogger, M., Merz, R., Blöschl, G. (2012):
Extreme rainstorms: comparing regional envelope curves to stochastically generated events
Water Resour. Res. 48 , W01509 10.1029/2011WR010515