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| Titel |
Streamflow response of a small forested catchment on different timescales |
| VerfasserIn |
A. Zabaleta, I. Antiguedad |
| 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 (2013-01-22), S.211-223 |
| Datensatznummer |
250017686
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| Publikation (Nr.) |
 copernicus.org/hess-17-211-2013.pdf |
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| Zusammenfassung |
| The hydrological response of a catchment to rainfall on different timescales is result of a complex system involving a range of physical processes
which may operate simultaneously and have different spatial and temporal
influences. This paper presents the analysis of streamflow response of a
small humid-temperate catchment (Aixola, 4.8 km2) in the Basque Country
on different timescales and discusses the role of the controlling factors.
Firstly, daily time series analysis was used to establish a hypothesis on
the general functioning of the catchment through the relationship between
precipitation and discharge on an annual and multiannual scale (2003–2008).
Second, rainfall-runoff relationships and relationships among several
hydrological variables, including catchment antecedent conditions, were
explored at the event scale (222 events) to check and improve the
hypothesis. Finally, the evolution of electrical conductivity (EC) during
some of the monitored storm events (28 events) was examined to identify the
time origin of waters. Quick response of the catchment to almost all the
rainfall events as well as a considerable regulation capacity was deduced
from the correlation and spectral analyses. These results agree with runoff
event scale data analysis; however, the event analysis revealed the
non-linearity of the system, as antecedent conditions play a significant
role in this catchment. Further, analysis at the event scale made possible
to clarify factors controlling (precipitation, precipitation intensity and
initial discharge) the different aspects of the runoff response (runoff
coefficient and discharge increase) for this catchment. Finally, the
evolution of EC of the waters enabled the time origin (event or pre-event
waters) of the quickflow to be established; specifically, the conductivity
showed that pre-event waters usually represent a high percentage of the
total discharge during runoff peaks. The importance of soil waters in the
catchment is being studied more deeply. |
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