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| Titel |
Detecting the long-term impacts from climate variability and increasing water consumption on runoff in the Krishna river basin (India) |
| VerfasserIn |
L. M. Bouwer, J. C. J. H. Aerts, P. Droogers, A. J. Dolman |
| 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 ; 10, no. 5 ; Nr. 10, no. 5 (2006-10-04), S.703-713 |
| Datensatznummer |
250008195
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| Publikation (Nr.) |
 copernicus.org/hess-10-703-2006.pdf |
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| Zusammenfassung |
| Variations in climate, land-use and water consumption can have profound
effects on river runoff. There is an increasing demand to study these
factors at the regional to river basin-scale since these effects will
particularly affect water resources management at this level. This paper
presents a method that can help to differentiate between the effects of
man-made hydrological developments and climate variability (including both
natural variability and anthropogenic climate change) at the basin scale. We
show and explain the relation between climate, water consumption and changes
in runoff for the Krishna river basin in central India. River runoff
variability due to observed climate variability and increased water
consumption for irrigation and hydropower is simulated for the last 100
years (1901–2000) using the STREAM water balance model. Annual runoff under
climate variability is shown to vary only by about 14–34 millimetres
(6–15%). It appears that reservoir construction after 1960 and increasing
water consumption has caused a persistent decrease in annual river runoff of
up to approximately 123 mm (61%). Variation in runoff under climate
variability only would have decreased over the period under study, but we
estimate that increasing water consumption has caused runoff variability
that is three times higher. |
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