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| Titel |
Aspects of seasonality and flood generating circulation patterns in a mountainous catchment in south-eastern Germany |
| VerfasserIn |
Th. Petrow, B. Merz, K.-E. Lindenschmidt, A. H. Thieken |
| 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 ; 11, no. 4 ; Nr. 11, no. 4 (2007-07-26), S.1455-1468 |
| Datensatznummer |
250009400
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| Publikation (Nr.) |
 copernicus.org/hess-11-1455-2007.pdf |
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| Zusammenfassung |
| Analyses of discharge series, precipitation fields and flood producing
atmospheric circulation patterns reveal that two governing flood regimes
exist in the Mulde catchment in south-eastern Germany: frequent floods
during the winter and less frequent but sometimes extreme floods during the
summer. Differences in the statistical parameters of the discharge data can
be found within the catchment from west to east. The discharges are compared
to a number of landscape parameters that influence the discharge in the
sub-catchments. Triggering circulation patterns were assigned to all events
of the annual maximum discharge series in order to evaluate which circulation
patterns are likely to produce large floods. It can be shown that the
cyclone Vb-weather regime (TM, TRM) generates the most extreme flood events
in the Mulde catchment, whereas westerly winds produce frequently small
floods. The Vb-weather pattern is a very slowly moving low pressure field
over the Gulf of Genoa, which can bring large amounts of rainfall to the
study area. It could also be shown that even with the two flood regimes
estimates with the annual maximum series provide a safer flood protection
with a larger safety margin than using summer maximum discharge series for
extreme summer floods only. In view of climate change it is necessary to
integrate knowledge about catchment characteristics, the prevailing flood
regime or the trends of weather patterns in the estimation of extreme
events. |
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