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Assessing the effect of climate change on mean annual runoff in the Songhua River basin, China

✍ Scribed by Dejuan Meng; Xingguo Mo

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
612 KB
Volume
26
Category
Article
ISSN
0885-6087

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✦ Synopsis

Abstract

Influences of climatic change on the components of global hydrological cycle, including runoff and evapotranspiration are significant in the mid‐ and high‐latitude basins. In this paper, the effect of climatic change on annual runoff is evaluated in a large basin—Songhua River basin which is located in the northeast of China. A method based on Budyko‐type equation is applied to separate the contributions of climatic factors to changes in annual runoff from 1960 to 2008, which are computed by multiplying their partial derivatives by the slopes of trends in climate factors. Furthermore, annual runoff changes are predicted under IPCC SRES A2 and B2 scenarios with projections from five GCMs. The results showed that contribution of annual precipitation to annual runoff change was more significant than that of annual potential evapotranspiration in the Songhua River basin; and the factors contributing to annual potential evapotranspiration change were ranked as temperature, wind speed, vapour pressure, and sunshine duration. In the 2020s, 2050s, and 2080s, changes in annual runoff estimated with the GCM projections exhibited noticeable difference and ranged from − 8·4 to − 16·8 mm a^−1^ (−5·77 to − 11·53% of mean annual runoff). Copyright © 2011 John Wiley & Sons, Ltd.

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