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| Titel |
Probabilistic Envelope Curves for Extreme Rainfall Events |
| VerfasserIn |
A. Castellarin, R. Merz, G. Blöschl |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250027364
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| Zusammenfassung |
| A regional envelope curve (REC) of flood flows summarises the current bound on our
experience of extreme floods in a region. REC are available for most regions of the world.
Recent scientific papers introduced a probabilistic interpretation of these curves and
formulated an empirical estimator of the recurrence interval T associated with a REC, which,
in principle, enables us to use REC for design purposes in ungauged basins. This
study extends the REC concept to extreme rainstorm events by introducing the
Depth-Duration Envelope Curves (DDEC). DDEC are defined as regional upper
bounds on observed rainfall maxima for various rainfall duration. Also, the study
adapts the probabilistic interpretation proposed for REC to DDEC and assesses
the suitability of these curves for estimating the T-year rainfall event associated
with a given duration and large T values. The study illustrates an application of
DDEC to annual maximum series of rainfall depth with duration spanning from
15 min. to 24 hrs. collected at 208 raingauges located in northern-central Italy. |
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