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| Titel |
The within-day behaviour of 6 minute rainfall intensity in Australia |
| VerfasserIn |
A. W. Western, B. Anderson, L. Siriwardena, F. H. S. Chiew, A. Seed, G. Blöschl |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 15, no. 8 ; Nr. 15, no. 8 (2011-08-18), S.2561-2579 |
| Datensatznummer |
250012927
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| Publikation (Nr.) |
 copernicus.org/hess-15-2561-2011.pdf |
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| Zusammenfassung |
| The statistical behaviour and distribution of high-resolution (6 min)
rainfall intensity within the wet part of rainy days (total rainfall depth
>10 mm) is investigated for 42 stations across Australia. This paper
compares nine theoretical distribution functions (TDFs) in representing
these data. Two goodness-of-fit statistics are reported: the Root Mean
Square Error (RMSE) between the fitted and observed within-day distribution;
and the coefficient of efficiency for the fit to the highest rainfall
intensities (average intensity of the 5 highest intensity intervals) across
all days at a site. The three-parameter Generalised Pareto
distribution was clearly the best performer. Good
results were also obtained from Exponential, Gamma, and
two-parameter Generalized Pareto distributions, each of which are two
parameter functions, which may be advantageous when predicting parameter
values. Results of different fitting methods are compared for different
estimation techniques. The behaviour of the statistical properties of the
within-day intensity distributions was also investigated and trends with
latitude, Köppen climate zone (strongly related to latitude) and daily
rainfall amount were identified. The latitudinal trends are likely related
to a changing mix of rainfall generation mechanisms across the Australian
continent. |
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