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| Titel |
Separation of run-off components of a glacierized catchment in Kyrgyzstan, Central Asia, by tracer methods (mainly δ2H, δ18O) and meteorological data |
| VerfasserIn |
Stephan M. Weise, Katy Unger-Shayesteh, Sergiy Vorogushyn, Olga Kalashnikova, Natalya Ershova |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250152746
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| Publikation (Nr.) |
 EGU/EGU2017-17625.pdf |
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| Zusammenfassung |
| Since 2014 the glacierized Ala Archa catchment (ca. 230 km2) in the Kyrgyz Alatau mountains south of Bishkek is investigated for run-off contributions of precipitation, groundwater, snow-melt, and glacier melt by tracer methods (δ2H, δ18O, electrical conductivity) and hydro-meteorological data (run-off, precipitation, air temperature, albedo). The investigation period is characterized by a high inter-annual variability in precipitation amount and summer run-off. The isotopic composition of run-off water is found to be governed more by the interplay of air temperature, precipitation history, and snow coverage than by its origin from direct precipitation, snow- or glacial melt. The isotopic composition of base flow in winter and early spring time is found to vary probably not due to a reservoir (mixing) but due to a phase exchange process (fractionation). In the light of these results a separation of all run-off components in such an environment simply with isotope methods appears to be unrealistic. |
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