Accounting for hydroclimatic properties in flood frequency analysis procedures
Abstract > 50 -year flood or Q 50) can be further biased when fit to an inappropriate distribution model because of differences in the tails between distribution families. Here, we demonstrate that hydroclimatic parameters can aid in the selection of a parametric flood frequency distribution. We use L-moment diagrams to visually show the fit of gaged annual maxima series across the United States, grouped by their Köppen climate classification and the precipitation intensities of the basin, to a general extreme value (GEV), log normal 3 (LN3), and Pearson 3 (P3) distribution. Our results show that in real space basic hydroclimatic properties of a basin exert a significant influence on the statistical distribution of the annual maxima. The best-fitted family distribution shifts from a GEV towards an LN3 distribution across a gradient from colder and wetter climates (Köppen group D, continental climates) towards more arid climates (Köppen group B, dry climates). Due to the diversity of hydrologic processes and flood-generating mechanisms among watersheds within large countries like the United States, we recommend that the selection of distribution model be guided by the hydroclimatic properties of the basin rather than relying on a single national distribution model.
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Bibliographic citation
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Accounting for hydroclimatic properties in flood frequency analysis procedures ; volume:28 ; number:1 ; year:2024 ; pages:217-227 ; extent:11
Hydrology and earth system sciences ; 28, Heft 1 (2024), 217-227 (gesamt 11)
- Creator
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Reinders, Joeri B.
Munoz, Samuel E.
- DOI
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10.5194/hess-28-217-2024
- URN
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urn:nbn:de:101:1-2024011803212824735310
- Rights
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Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
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15.08.2025, 7:26 AM CEST
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- Reinders, Joeri B.
- Munoz, Samuel E.
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