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| Titel |
Development of a flood index for Ireland |
| VerfasserIn |
Shaun Harrigan, Conor Murphy, Robert L. Wilby |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250112768
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| Publikation (Nr.) |
 EGU/EGU2015-12944.pdf |
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| Zusammenfassung |
| Anthropogenic greenhouse gas induced climate change is expected to intensify the global hydrological cycle, leading to increased magnitude and frequency of floods; hence increasing the physical hazard component of flood risk. However, at regional scales the influence of natural large-scale climate variability often dominates and has been linked to periods of enhanced/reduced flooding. This is problematic for assessing trends in flood time-series as observed data at daily/sub-daily resolution are often too short and hence detected changes reflect a snap-shot of climate variability rather than evidence of long-term climate change. This study presents initial results extending a flood index developed in the UK to the Irish domain. First, areas that reflect similar extreme precipitation generating mechanisms are identified in order to group streamflow stations into a number of distinct regions. An objective weather classification scheme is then used to reconstruct the atmospheric drivers of fluvial flood occurrence over multi-decadal time-scales; allowing for the analysis of which weather types are relatively flood-rich/flood-poor. This index can then be used to place short term fluctuations in flooding in context of longer term variations. |
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