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| Titel |
Climate changes of hydrometeorological and hydrological extremes in the Paute basin, Ecuadorean Andes |
| VerfasserIn |
D. E. Mora, L. Campozano, F. Cisneros, G. Wyseure, P. Willems |
| 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 ; 18, no. 2 ; Nr. 18, no. 2 (2014-02-19), S.631-648 |
| Datensatznummer |
250120282
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| Publikation (Nr.) |
 copernicus.org/hess-18-631-2014.pdf |
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| Zusammenfassung |
| Investigation was made on the climate change signal for hydrometeorological
and hydrological variables along the Paute River basin, in the southern
Ecuador Andes. An adjusted quantile perturbation approach was used for
climate downscaling, and the impact of climate change on runoff was studied
for two nested catchments within the basin. The analysis was done making use
of long daily series of seven representative rainfall and temperature sites
along the study area and considering climate change signals of global and
regional climate models for IPCC SRES scenarios A1B, A2 and B1. The
determination of runoff was carried out using a lumped conceptual
rainfall–runoff model. The study found that the range of changes in
temperature is homogeneous for almost the entire region with an average
annual increase of approximately +2.0 °C. However, the warmest periods
of the year show lower changes than the colder periods. For rainfall,
downscaled results project increases in the mean annual rainfall depth and
the extreme daily rainfall intensities along the basin for all sites and all
scenarios. Higher changes in extreme rainfall intensities are for the wetter
region. These lead to changes in catchment runoff flows, with increasing
high peak flows and decreasing low peak flows. The changes in high peak
flows are related to the changes in rainfall extremes, whereas the
decreases in the low peak flows are due to the increase in temperature and
potential evapotranspiration together with the reduction in the number of
wet days. |
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