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| Titel |
Flood trends along the Rhine: the role of river training |
| VerfasserIn |
S. Vorogushyn, B. Merz |
| 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 ; 17, no. 10 ; Nr. 17, no. 10 (2013-10-10), S.3871-3884 |
| Datensatznummer |
250085951
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| Publikation (Nr.) |
 copernicus.org/hess-17-3871-2013.pdf |
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| Zusammenfassung |
| Several previous studies have detected positive trends in flood flows in German
rivers, among others, at Rhine gauges over the past six decades. The presence
and detectability of the climate change signal in flood records has been
controversially discussed, particularly against the background of massive
river training measures in the Rhine. In the past the Rhine catchment has been heavily
trained, including the construction of the Rhine weir cascade, flood
protection dikes and detention basins. The present study investigates the
role of river training on changes in annual maximum daily flows at Rhine
gauges starting from Maxau down to Lobith. In particular, the effect of the
Rhine weir cascade and of a series of detention basins was investigated. By
homogenising the original flood flow records in the period from 1952 till
2009, the annual maximum series were computed that would have been recorded
had river training measures not been in place. Using multiple trend analysis,
relative changes in the homogenised time series were found to be from a few
percentage points to more than 10 percentage points smaller compared to the original
records. This effect is attributable to the river training measures, and
primarily to the construction of the Rhine weir cascade. The increase in
Rhine flood discharges during this period was partly caused by an unfavourable superposition of
the Rhine and Neckar flood waves. This superposition resulted from an acceleration of the
Rhine waves due to the construction of the weir cascade and associated
channelisation and dike heightening. However, at the same time, tributary
flows across the entire Upper and Lower Rhine, which enhance annual maximum
Rhine peaks, showed strong positive trends. This suggests the dominance of
another driver or drivers which acted alongside river training. |
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