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| Titel |
Streamflow droughts in the Iberian Peninsula between 1945 and 2005: spatial and temporal patterns |
| VerfasserIn |
J. Lorenzo-Lacruz, E. Morán-Tejeda, S. M. Vicente-Serrano, J. I. López-Moreno |
| 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. 1 ; Nr. 17, no. 1 (2013-01-17), S.119-134 |
| Datensatznummer |
250017679
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| Publikation (Nr.) |
 copernicus.org/hess-17-119-2013.pdf |
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| Zusammenfassung |
| In this study we analyzed the spatiotemporal variability of streamflow
droughts in the Iberian Peninsula from 1945 to 2005. Streamflow series
belonging to 187 homogeneously distributed gauging stations across the study
area were used to develop a standardized streamflow index (SSI), which facilitated comparison among regimes and basins,
regardless of streamflow magnitudes. A principal component analysis was
performed to identify homogeneous hydrological regions having common
features based on the temporal evolution of streamflows. Identification of
drought events was carried out using a threshold level approach. We assessed
the duration and magnitude of drought episodes and the changes that occurred
between two contrasting periods for each hydrological region. The results
showed a trend toward increased drought severity in the majority of regions.
Drought duration, magnitude and spatial coverage were found to depend mainly
on climatic conditions and the water storage strategies in each basin. In
some basins these strategies have altered river regimes, and in others
created a high level of dependence on storage and water transfer rates. |
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