Lake Level Changes Recorded by Tree Rings of Lakeshore Shrubs： A Case Study at the Lake West-Juyan, Inner Mongolia, China
Lake Level Changes Recorded by Tree Rings of Lakeshore Shrubs： A Case Study at the Lake West-Juyan, Inner Mongolia, China
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DOI：
10.1111/j.1744-7909.2005.00190.x
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发表时间：
2005-11
影响因子：
11.4
通讯作者：
S. Xiao;Honglang Xiao;J. Si;Xi-bin Ji;Fa-min Liu
中科院分区：
文献类型：
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作者：
S. Xiao;Honglang Xiao;J. Si;Xi-bin Ji;Fa-min Liu
：水资源变化是影响干旱地区生态水文过程和可持续发展的主要因素。湖泊水位变化是水资源变化的有用指标。然而，湖泊水位变化的观测记录通常太短，无法了解长期变化。在本研究中，我们对中国西部黑河终点西居延湖湖岸生长的灌木的年轮进行了调查，发现西居延湖在过去200年里经历了3次退化。 1800年至1900年期间，湖泊水位从海拔904.3米下降至896.8米（a.s.1.），降至892.0米a.s.1。从1900年左右到1950年代后期，湖泊于1963年干涸。以三个海滩坝的综合年代为代表的湖泊水位变化趋势表明，过去150年中湖泊水位上升的阶段是1852-1871年、1932-1952年、1973-1982年和1995-1999年。与区域经济发展历史对比表明，近200年来，人类活动对黑河流域下游水资源的调节发挥了重要作用。 （总编辑：韩亚勤）
: Variation in water resources is a main factor influencing ecohydrological processes and sustainable development in arid regions. Lake level changes are a useful indicator of the variability in water resources. However, observational records of changes in lake levels are usually too short to give an understanding of the long-term variability. In the present study, we investigated the tree rings of shrubs growing on the lakeshore of Lake West-Juyan, the terminus of the Heihe River in western China, and found that Lake West-Juyan had undergone degradation three times over the past 200 years. The lake level decreased from 904.3 to 896.8 m above sea level (a.s.1.) during the period 1800–1900, to 892.0 m a.s.1. from around 1900 to the late 1950s, and the lake dried out in 1963. The trend for changes in lake levels, which was represented by the composite chronology of three beach bars, showed that the phases of increasing lake levels over the past 150 years were during the periods 1852–1871, 1932–1952, 1973–1982, and 1995–1999. Comparison with the history of regional economic development showed that human activity has played an important role in regulating the water resources of the lower reaches of the Heihe watershed over the past 200 years. (Managing editor: Ya-Qin HAN)