Glacier change and glacier runoff variation in the Tuotuo River basin,the source region of Yangtze River in western China |
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| Authors: | Yong Zhang Shiyin Liu Junli Xu Donghui Shangguan |
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| Institution: | (1) State Key Laboratory of Cryospheric Science, Cold and Arid Regions Environmental and Engineering Research Institute (CAREERI), Chinese Academy of Sciences (CAS), Lanzhou, 730000, People’s Republic of China;(2) Graduate School of Environmental Studies, Nagoya University, Nagoya 464-8601, Japan |
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| Abstract: | Glaciers in the Tuotuo River basin, western China, have been monitored in recent decades by applying topographical maps and
high-resolution satellite images. Results indicate that most of glaciers in the Tuotuo River basin have retreated in the period
from 1968/1971 to 2001/2002, and their shrinkage area is 3.2% of the total area in the late 1960s. To assess the influence
of glacier runoff on river runoff, a modified degree–day model including potential clear-sky direct solar radiation has been
applied to the glaciated regions of the river basin over the period 1961–2004. It was found that glacier runoff has increased
in the last 44 years, especially in the 1990s when a two-thirds increase in river runoff was derived from the increase in
glacier runoff caused by loss of ice mass in the entire Tuotuo River basin. |
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| Keywords: | Tuotuo River basin Glacier change Glacier runoff River runoff Climate change Water resources |
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