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| Titel |
Temporal properties of rainfall events in Calabria (southern Italy) |
| VerfasserIn |
O. G. Terranova, P. Iaquinta |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Science ; 11, no. 3 ; Nr. 11, no. 3 (2011-03-09), S.751-757 |
| Datensatznummer |
250009256
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| Publikation (Nr.) |
 copernicus.org/nhess-11-751-2011.pdf |
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| Zusammenfassung |
Temporal properties of 152 575 rainfall events, recorded at time steps of
5 min, having different durations and occurring between 1989 and 2008 at
155 localities of Calabria (Italy), have been analysed in this paper. Samples from 45 533 storms
have been selected to classify rainfall events as "significant" with
regard to their contribution to soil erosion, flooding and/or other
geo-hydrological processes. The samples are representative of a wide variety
of situations in terms of duration, total rainfall, intensity, etc.
The use of standardized rainfall profiles (SRP) is proposed to describe the
within-storm temporal pattern. The main attraction of this method lies in
the fact that it is based on actual data of regional precipitation. Its weak
point is that large samples of data are required to obtain regional
profiles. The research necessities for improving the use of Huff curves for storm disaggregation and
its the potential use are summarized in this paper on the basis of the specific literature.
A new criterion – based on the comparison of the areas A1,
A2, A3 and A4 that underlie the four 25% of durations of a
given SRP, and the corresponding four values of the "uniform" SRP (USRP), is
suggested here with the aim of improving the use of the information content of
SRP. Some interesting results concerning the sample frequency and the
characterization of parameters for hydrological applications are commented
on.
The study conducted so far has produced important, albeit preliminary,
results for different contexts of Calabria concerning the use
of SRP among the methods for constructing design storm hyetographs. |
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