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| Titel |
Estimating rainfall distributions at high temporal resolutions using a multifractal model |
| VerfasserIn |
A. Pathirana, S. Herath, T. Yamada |
| 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 ; 7, no. 5 ; Nr. 7, no. 5, S.668-679 |
| Datensatznummer |
250004788
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| Publikation (Nr.) |
 copernicus.org/hess-7-668-2003.pdf |
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| Zusammenfassung |
| Rainfall data from 18 stations in the vicinity of Tokyo city, measured to a
precision of 1 mm, were analysed for multifractal properties. A multifractal model based
on the scaling properties of temporal distribution of rainfall intensities was formulated
to investigate the intensity distribution relationships in the available scaling regime.
Although conventional analysis did not provide encouraging results with these measurements,
an alternative approach that could be applied to rainfall data of widely variable quality
and duration was used to establish a scaling relationship between daily and hourly rainfall
intensities. Using a discrete cascade algorithm based on the log-Lèvy generator, synthetic
hourly rainfall series were generated from the multifractal statistics of daily-accumulated
rainfall. Several properties of rainfall time series that are relevant to the use of
rainfall data in surface hydrological studies were used to determine, statistically, the
degree of agreement between the synthetic hourly series and observed hourly rainfall.
Keywords: rainfall modelling, cascades, multifractal, downscaling |
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