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干旱区科学  2016, Vol. 8 Issue (4): 479-491    DOI: 10.1007/s40333-016-0125-5
  学术论文 本期目录 | 过刊浏览 | 高级检索 |
Effects of climate change and human activity on lake shrinkage in Gonghe Basin of northeastern Tibetan Plateau during the past 60 years
WU Duo*, CHEN Fahu, LI Kai, XIE Yaowen, ZHANG Jiawu, ZHOU Aifeng
College of Earth and Environmental Sciences, MOE Key Laboratory of Western China’s Environmental Systems, Lanzhou University, Lanzhou 73000, China
Effects of climate change and human activity on lake shrinkage in Gonghe Basin of northeastern Tibetan Plateau during the past 60 years
WU Duo*, CHEN Fahu, LI Kai, XIE Yaowen, ZHANG Jiawu, ZHOU Aifeng
College of Earth and Environmental Sciences, MOE Key Laboratory of Western China’s Environmental Systems, Lanzhou University, Lanzhou 73000, China
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摘要 Changes in the status of freshwater resources are a topic of major global, regional and local concern. This is especially so in the arid and semi-arid regions of China, where shortage of water resources plays a crucial role in limiting sustainable socioeconomic development, as well as in sustaining natural ecosystems. Recent climate change, as well as the effects of localized human activity, such as the use of water for irrigation agriculture, may have significant effects on the status of the water resources in the region. Here, we report the results of a study of changes in the areas of lakes in Gonghe Basin, northeastern Tibetan Plateau of China, over the last 60 years. The data were acquired from optical satellite images and demonstrate that the total water area of lakes in Gonghe Basin decreased significantly from the 1950s to 1980s. The cause is ascribed mainly to human activity including exploitation of farmland, against a background of increasing population; in addition, climatic data for the region demonstrate a minor drying trend during this period as the temperature increased slightly. After the construction of several reservoirs, significant amounts of water were redistributed to promote irrigation agriculture and we conclude that this caused a significant shrinkage of the natural lakes. However, both the area of farmland and the population size remained approximately constant after 1990. We conclude that the variation of the total area of lakes during the second period was mainly controlled by climatic factors (precipitation and temperature). As the regional temperature reached a new high, the area of some of the lakes decreased sharply before finally maintaining a relatively steady state. We emphasize that anthropogenic climate change and human activity have both significantly influenced the status of water resources in the arid and semi-arid regions of China.
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WU Duo
CHEN Fahu
LI Kai
XIE Yaowen
ZHANG Jiawu
ZHOU Aifeng
关键词:  stand structure  height-diameter relationship  Populus euphratica  tree vitality  Tarim River    
Abstract: Changes in the status of freshwater resources are a topic of major global, regional and local concern. This is especially so in the arid and semi-arid regions of China, where shortage of water resources plays a crucial role in limiting sustainable socioeconomic development, as well as in sustaining natural ecosystems. Recent climate change, as well as the effects of localized human activity, such as the use of water for irrigation agriculture, may have significant effects on the status of the water resources in the region. Here, we report the results of a study of changes in the areas of lakes in Gonghe Basin, northeastern Tibetan Plateau of China, over the last 60 years. The data were acquired from optical satellite images and demonstrate that the total water area of lakes in Gonghe Basin decreased significantly from the 1950s to 1980s. The cause is ascribed mainly to human activity including exploitation of farmland, against a background of increasing population; in addition, climatic data for the region demonstrate a minor drying trend during this period as the temperature increased slightly. After the construction of several reservoirs, significant amounts of water were redistributed to promote irrigation agriculture and we conclude that this caused a significant shrinkage of the natural lakes. However, both the area of farmland and the population size remained approximately constant after 1990. We conclude that the variation of the total area of lakes during the second period was mainly controlled by climatic factors (precipitation and temperature). As the regional temperature reached a new high, the area of some of the lakes decreased sharply before finally maintaining a relatively steady state. We emphasize that anthropogenic climate change and human activity have both significantly influenced the status of water resources in the arid and semi-arid regions of China.
Key words:  stand structure    height-diameter relationship    Populus euphratica    tree vitality    Tarim River
收稿日期:  2015-10-29      修回日期:  2015-12-17           出版日期:  2016-08-10      发布日期:  2016-04-21      期的出版日期:  2016-08-10
基金资助: 

The National Natural Science Foundation of China (41372180), the Open Foundation of MOE Key Laboratory of Western China’s Environmental System, Lanzhou University and the Fundamental Research Funds for the Central Universities (lzujbky-2015-bt01).

通讯作者:  WU Duo    E-mail:  wud_2008@lzu.edu.cn
引用本文:    
WU Duo, CHEN Fahu, LI Kai, XIE Yaowen, ZHANG Jiawu, ZHOU Aifeng. Effects of climate change and human activity on lake shrinkage in Gonghe Basin of northeastern Tibetan Plateau during the past 60 years[J]. 干旱区科学, 2016, 8(4): 479-491.
WU Duo, CHEN Fahu, LI Kai, XIE Yaowen, ZHANG Jiawu, ZHOU Aifeng. Effects of climate change and human activity on lake shrinkage in Gonghe Basin of northeastern Tibetan Plateau during the past 60 years. Journal of Arid Land, 2016, 8(4): 479-491.
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