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| Titel |
Defining high-flow seasons using temporal streamflow patterns from a global model |
| VerfasserIn |
D. Lee, P. Ward, P. Block |
| 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 ; 19, no. 11 ; Nr. 19, no. 11 (2015-11-27), S.4689-4705 |
| Datensatznummer |
250120858
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| Publikation (Nr.) |
 copernicus.org/hess-19-4689-2015.pdf |
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| Zusammenfassung |
| Globally, flood catastrophes lead all natural hazards in terms of impacts on
society, causing billions of dollars of damages annually. Here, a novel
approach to defining high-flow seasons (3-month) globally is presented by
identifying temporal patterns of streamflow. The main high-flow season is
identified using a volume-based threshold technique and the PCR-GLOBWB model.
In comparison with observations, 40 % (50 %) of locations at a station
(sub-basin) scale have identical peak months and 81 % (89 %) are within
1 month, indicating fair agreement between modeled and observed high-flow
seasons. Minor high-flow seasons are also defined for bi-modal flow regimes.
Identified major and minor high-flow seasons together are found to well
represent actual flood records from the Dartmouth Flood Observatory, further
substantiating the model's ability to reproduce the appropriate high-flow
season. These high-spatial-resolution high-flow seasons and associated
performance metrics allow for an improved understanding of temporal
characterization of streamflow and flood potential, causation, and
management. This is especially attractive for regions with limited
observations and/or little capacity to develop early warning flood systems. |
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