Extreme value modeling of areal rainfall from weather radar
| Autor: | Overeem, A., Buishand, T.A., Holleman, I., Uijlenhoet, R. |
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| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
curves
WIMEK frequency estimation duration precipitation annual maxima precipitation Hydrology and Quantitative Water Management frequentieverdeling meteorological observations frequency distribution neerslag intervals reduction factors duur sites meteorologische waarnemingen Hydrologie en Kwantitatief Waterbeheer radar |
| Zdroj: | Water Resources Research 46 (2010) Water Resources Research, 46 |
| ISSN: | 0043-1397 |
| Popis: | An 11 year high-quality radar rainfall data set is used to abstract annual maximum rainfall depths for durations of 15 min to 24 h and area sizes of 6 to 1.7 × 103 km2 for the Netherlands. Generalized extreme value (GEV) distributions are fitted to the annual maxima. A new method is presented to describe the distribution of extreme areal rainfall depths by modeling GEV parameters as a function of both duration and area size. This leads to a semiempirical expression from which quantiles of extreme rainfall depths can be obtained for a chosen duration, area size, and return period. The uncertainties in these quantiles are calculated using the bootstrap method. Radar-based areal reduction factors (ARFs) are derived. These ARFs are comparable to those based on high-density rain gauge networks derived from the literature. It is concluded that radar data, after careful quality control, are suitable to estimate extreme areal rainfall depths |
| Databáze: | OpenAIRE |
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