| 疏勒河源区的多年冻土 |
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| 引用本文： | 吴吉春,盛煜,李静,王杰.疏勒河源区的多年冻土[J].地理学报,2009,64(5). |
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| 作者姓名： | 吴吉春 盛煜 李静 王杰 |
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| 作者单位： | 1. 中国科学院寒区旱区环境与工程研究所,冻土工程国家重点实验室,兰州,730000
2. 中国科学院寒区旱区环境与工程研究所,冰冻圈科学国家重点实验室,兰州,730000 |
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| 基金项目： | 国家重点基础研究发展规划(973计划)，国家自然科学基金 |
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| 摘 要： | 疏勒河流域地处祁连山西段,气候极端干旱.2008年6月在疏勒河源区海拔3729-3890 m的不同地面、地形条件下在5个点上布设了10眼钻孔进行钻探勘察,并布设测温管定期监测地温.根据勘察和测温资料,确定了疏勒河流域内多年冻土下界高程在3750 m左右,查明河谷中松散地层以冲积层为主,多为粗颗粒土,多年冻土含冰量普遍较低.局地因素对多年冻土状态影响明显.其中坡度差异可以使地温相差0.5℃.坡向的差异可以使地温相差达1.0℃;地层水分含量对浅层地温的影响甚至超过坡向的影响;地面状态的差异,造成地温、活动层厚度等方面的显著差异.与祁连山中东部地区相比,疏勒河源区多年冻土几乎没有生态过程的影响,多年冻土形成和保存受气候驱动,基本上代表了一类干旱气候条件下的多年冻土特征.
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| 关 键 词： | 疏勒河源区 干旱条件 多年冻土 祁连山 |
Permafrost in Source Areas of Shule River in Qilian Mountains |
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| WU Jichun,SHENG Yu,LI Jing,WANG Jie.Permafrost in Source Areas of Shule River in Qilian Mountains[J].Acta Geographica Sinica,2009,64(5). |
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| Authors: | WU Jichun SHENG Yu LI Jing WANG Jie |
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| Institution: | 1. State Key Laboratory of Frozen Soil Engineering;CAREERI;CAS;Lanzhou 730000;China;2. State Key Laboratory of Cryospheric Science;China |
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| Abstract: | The Shlehe River Basin is located in the western part of the Qilian Mountains, where climate is very dry. Ten boreholes were drilled at 5 sites on various types of land surface and terrain in the source areas of the Shule River valley for monitoring permafrost, and measured temperature tubes were assembled in the boreholes. According to records of borehole and measured temperature, the elevation of permafrost lower limit was determined to be 3750 m (a.s.l.) and volume of ground ice was little because loose ... |
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| Keywords: | source areas of Shule River arid condition permafrost Qilan Mountains |
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