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| Titel |
Multiple scale flood simulation in the Delaware River Basin: Hurricane Ivan |
| VerfasserIn |
Luciana Kindl da Cunha, James Smith, Mary Lynn |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250081941
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| Zusammenfassung |
| Tropical cyclones shape the upper tail of flood peak distributions in the Delaware River
Basin, as well as other major drainage basins of the eastern US. During Hurricane Ivan (Sept,
2004) peak flows ranking in the upper 10% of the peak flow distribution were observed in
many sites. In this study we apply a fully-distributed, physically-based, and calibration-free
hydrological model (CUENCAS) to simulate inland flooding caused by Ivan for
basin scales ranging from one to thousands of square kilometers. As input to the
hydrological model we use the Stage IV rainfall fields produced by The National Weather
Service. Stage IV is a post-processed product based on the merging of radar and gauge
rainfall data. We show that simulation uncertainties decrease as basin scales increase.
Small basin hydrological simulations are strongly affected by rainfall space-time
variability, hydrological response heterogeneities due to natural (infiltration and basin
shape) and artificial basin properties (dams), and by input and model structural
uncertainties. These small-scale heterogeneities and uncertainties are averaged out by the
effect of the river network that links different areas in the basin and organizes flow
transport. Consequently, good results are obtained for basins larger than 1,000 km2. |
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