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《Journal of Glaciology and Geocryology》 2004-01
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Permafrost Degradation and Its Environmental Sequent in the Source Regions of the Yellow River

ZHANG Sen-qi~1, WANG Yong-gui~1, ZHAO Yong-zhen~2, HUANG Yong+1,LI Yong-guo~1, SHI Wei-dong~1, SHANG Xiao-gang~1(1.Qinghai Institute of Geological Survey ,Xinning Qinghai 810012, China; 2.Qinghai Department of Land and Resources, Xining, Qinghai 810012, China)  
From the available data of eco-environmental geology and desertification due to permafrost degradation in the source regions of the Yellow River, it is found that the eco-environment is deteriorating in permafrost regions. Permafrost degradation results in lowering or disappearing of the level of groundwater in the seasonal thawing layer, on which the growth of alpine meadow in cold regions depends. Thus, the alpine meadow in cold regions is degrading, together with water environment aggravating. It is the main reason that the alpine meadow, which holds the balance in the source regions of the Yellow River, is losing water and going to desertification.
【Fund】: 中国地质调查局"黄河源区1∶25万生态环境地质调查"项目(19991230004121)资助
【CateGory Index】: P642.14
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