| 引用本文: | 赵韬,张明义,路建国,晏忠瑞.多年冻土区地表变形与影响因素相关性分析[J].哈尔滨工业大学学报,2021,53(11):145.DOI:10.11918/202006098 |
| ZHAO Tao,ZHANG Mingyi,LU Jianguo,YAN Zhongrui.Correlation between ground surface deformation and influential factors in permafrost regions[J].Journal of Harbin Institute of Technology,2021,53(11):145.DOI:10.11918/202006098 |
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| 多年冻土区地表变形与影响因素相关性分析 |
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赵韬1,2,张明义1,路建国1,2,晏忠瑞1,2
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(1.中国科学院 西北生态环境资源研究院 冻土工程国家重点实验室,兰州 730000; 2.中国科学院大学,北京 100049)
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| 摘要: |
| 为研究多年冻土区地表变形与影响因素之间的相关性,以青藏工程走廊西大滩至安多多年冻土区为研究对象,利用小基线集合成孔径雷达干涉测量（small baseline subset-interferometric synthetic aperture radar,SBAS-InSAR）技术,获取研究区地表变形信息；借助GIS平台,根据经验计算模型,获取研究区体积含冰量、年平均地温、活动层厚度3个影响因素基础数据；利用简单相关和偏相关分析法,分析地表变形与影响因素间的相关系数。结果表明:研究区地表年变形速率介于-33～15 mm/a,地表有缓慢下沉趋势,整个研究区年变形速率均值为-13 mm/a；在体积含冰量大于30%、年平均地温高于-1 ℃的区域,地表变形与影响因素有强相关性,偏相关系数大于0.8,P<0.05。在体积含冰量为10%～30%、年平均地温为-2～-1 ℃、活动层厚度大于3 m的区域,地表变形与影响因素有较强相关性,偏相关系数介于0.4～0.8,P<0.05。总体而言,多年冻土区地表变形与体积含冰量和年平均地温有正强相关性,偏相关系数均值为0.75和0.70；与活动层厚度有正中等相关性,偏相关系数均值为0.42。 |
| 关键词: 多年冻土 青藏工程走廊 地表变形 影响因素 相关性 |
| DOI：10.11918/202006098 |
| 分类号:P463.25;G863 |
| 文献标识码:A |
| 基金项目:冻土工程国家重点实验室自主研究课题(SKLFSE-ZT-23) |
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| Correlation between ground surface deformation and influential factors in permafrost regions |
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ZHAO Tao1,2,ZHANG Mingyi1,LU Jianguo1,2,YAN Zhongrui1,2
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(1.State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;2.University of Chinese Academy of Sciences, Beijing 100049, China)
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| Abstract: |
| To study the correlation between ground surface deformation and influential factors in permafrost regions, the Qinghai-Tibet Engineering Corridor (QTEC) from Xidatan to Amdo was chosen as research object. The small baseline subset-interferometric synthetic aperture radar (SBAS-InSAR) technique was applied to obtain the ground surface deformation of the study area. Empirical models were used to calculate the influential factors of the study area, including volume ice content, mean annual ground temperature, and active layer thickness, with the help of geographic information system (GIS) technology. Simple and partial correlation analysis methods were used to analyze the correlation coefficient between ground surface deformation and influential factors. Results show that the ground surface annual deformation rate ranged from -33 mm/a to 15 mm/a, and the study area was mainly dominated by settlement, with the mean ground surface annual deformation rate in the whole study area about -13 mm/a. In the areas where the volume ice content was greater than 30% and the mean annual ground temperature was higher than -1 ℃, the ground surface deformation was closely related to the influential factors, with the partial correlation coefficient greater than 0.8 and the P value less than 0.05. In the areas where the volume ice content ranged from 10% to 30%, the mean annual ground temperature was between -2 ℃ and -1 ℃, and the active layer was thicker than 3 m, the ground surface deformation had a stronger relationship with the influential factors that the partial correlation coefficient was about 0.4-0.8 and the P value was less than 0.05. In general, the ground surface deformation had strong positive correlation with volume ice content and mean annual ground temperature that the mean partial correlation coefficient was about 0.75 and 0.70 respectively, and there was a moderate positive correlation between ground surface deformation and active layer thickness that the mean partial correlation coefficient was 0.42. |
| Key words: permafrost Qinghai-Tibet Engineering Corridor ground surface deformation influential factor correlation |
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