测绘通报 ›› 2023, Vol. 0 ›› Issue (5): 21-26,43.doi: 10.13474/j.cnki.11-2246.2023.0130

• 滑坡监测与分析 • 上一篇    下一篇

顾及多动态环境因子的滑坡演化规律研究——以西宁市9大滑坡区为例

胡祥祥1, 柯福阳1,2, 张志山3, 姚永顺3, 宋宝4, 明璐璐1, 尹继鑫3, 张海欢5   

  1. 1. 南京信息工程大学遥感与测绘工程学院, 江苏 南京 210044;
    2. 南京信息工程大学无锡研究院, 江苏 无锡 214000;
    3. 西宁测绘院, 青海 西宁 810000;
    4. 北京理工大学自动化学院, 北京 100081;
    5. 西宁市不动产登记服务中心, 青海 西宁 810000
  • 收稿日期:2022-12-28 修回日期:2023-03-21 发布日期:2023-05-31
  • 通讯作者: 柯福阳。E-mail:ke.fuyang@qq.com
  • 作者简介:胡祥祥(1996-),男,硕士,主要研究方向为地质灾害。E-mail:837531464@qq.com
  • 基金资助:
    江苏省自然科学基金(BK20211037);江苏省科技项目社发项目(BE2021622);2022年度第六期江苏省“333人才”培养支持资助(BRA2022042)

Landslide evolution law considering multiple dynamic environmental factors: a case study of nine landslide areas in Xining city

HU Xiangxiang1, KE Fuyang1,2, ZHANG Zhishan3, YAO Yongshun3, SONG Bao4, MING Lulu1, YIN Jixin3, ZHANG Haihuan5   

  1. 1. School of Remote Sensing and Geomatics Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China;
    2. Wuxi Research Institute, Nanjing Information Engineering University, Wuxi 214000, China;
    3. Xining Surveying and Mapping Institute, Xining 810000, China;
    4. School of Automation, Beijing Institute of Technology, Beijing 100081, China;
    5. Xining Real Estate Registration Service Center, Xining 810000, China
  • Received:2022-12-28 Revised:2023-03-21 Published:2023-05-31

摘要: 本文利用2018—2022年103景Sentinel-1A数据,采用SBAS-InSAR方法,获得了西宁市坡向沉降信息,研究西宁市滑坡区坡向沉降的趋势特征及其同区域内如植被覆盖、降水等因素之间存在的耦合关系。结果表明,西宁市滑坡区的沉降趋势呈现出坡向分异的特征,具体表现为阳坡沉降速率大于阴坡沉降速率。根据这一沉降变化特性,本文分析得出更深层次的特征机制:①植被覆盖度越低,滑坡形变速率越高;②降水量可能导致特征点的形变量短期上升,但总体仍呈下降状态;③地物威胁主要来自阳坡,坡度越高区域往往是滑坡区速率最大的地方。为此,未来西宁市滑坡的注意力应该更倾向于西南坡方向,提高本区域滑坡监测与预警的警觉性。

关键词: SBAS-InSAR, 滑坡, 坡向, 沉降规律, 降水

Abstract: In this paper, using 103-view Sentinel-1A data from 2018 to 2022, the SBAS-InSAR method was used to obtain information on slope-oriented subsidence in Xining city and to study the trend characteristics of slope-oriented subsidence in the landslide area of Xining city and its coupling relationship with factors such as vegetation cover and precipitation in the region. The results show that the sedimentation trend in the landslide area of Xining city shows the characteristics of slope divergence. Specifically, the degree of landslide sedimentation in the Yang slope area changes dramatically, and its sedimentation rate is faster than that of the Yin slope. According to this characteristic of subsidence change, this paper conducted a more profound study and characteristic mechanism:① The lower the vegetation cover, the higher the landslide deformation rate and the sunny slope is more prone to landslide than the shady slope. ② The amount of precipitation may lead to a short-term increase in the deformation variables of the characteristic points, but the overall situation is still decreasing. ③ The threat of features mainly comes from the sunny slope, and the higher slope area tends to be the place where the rate of landslide area is the largest. Therefore, the attention to landslides in Xining city should be more inclined to the southwest slope in the future to improve the alertness of landslide monitoring and warning in this region.

Key words: SBAS-InSAR, landslide, slope orientation, subsidence pattern, precipitation

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