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| Titel |
Scaling Analysis of the Ganges-Brahmaputra River Discharge |
| VerfasserIn |
Malarvizhi Arulraj, V. Venugopal, Fabrice Papa, Sujit K. Bala |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250099640
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| Publikation (Nr.) |
 EGU/EGU2014-15445.pdf |
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| Zusammenfassung |
| In this study, we characterize the scaling properties of the Ganges-Brahmaputra river
discharge. Using 50 years (1950-2000) of in situ measurements of daily discharge at
Hardinge (for the Ganges) and Bahadurabad (for the Brahmaputra), we first establish that
there is no obvious evidence of the impact of climate change on the discharge of either river;
specifically, we find that there is no significant change in the discharge seasonal cycle nor in
the variance of their subseasonal fluctuations. Having established weak second order
stationarity, we analyse and show that there exists a power-law scaling between 2 days and 60
days for both rivers’ normalized discharge fluctuations. The utility of this type of
scale-invariance will be illustrated with a temporal disaggregation model, which relates
small-scale to large-scale variability (by just a ratio of scales) and enables us to disaggregate
10-day or 35-day discharge estimates from satellite altimetry to the daily scale. |
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