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Advances in Earth Science >

2022 , Vol. 37 >Issue 10: 1054 - 1065

DOI: https://doi.org/10.11867/j.issn.1001-8166.2022.042

Research on the Spatial Distribution Law and Early-Warning Criteria of Landslide Displacement Stages in a Big Data Environment

  • Kai WANG ,
  • Shaojie ZHANG ,
  • Juan MA ,
  • Hongjuan YANG ,
  • Dunlong LIU ,
  • Chaoping YANG
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  • 1.Institute of Civil Engineering, Zhongyuan University of Technology, Zhengzhou 450007, China
    2.Key Laboratory of Mountain Hazards and Earth Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China
    3.China Institute of Geo-environment Monitoring, Beijing 100081, China
    4.College of Software Engineering, Chengdu University of Information Technology, Chengdu 610041, China
WANG Kai (1991-), male, Zhengzhou City, Henan Province, Lecturer. Research areas include rainfall type landslides risk assessment and warning. E-mail: 6696@zut.edu.cn
MA Juan (1983-), female, Huangshan City, Anhui Province, Professor of engineering. Research areas include geohazards monitoring and warning. E-mail: majuan@mail.cgs.gov.cn

Received date: 2022-03-31

  Revised date: 2022-06-12

  Online published: 2022-10-18

Supported by

the National Key Research and Development Program of China “Research and application of intelligent monitoring and treatment technology for geohazards in villages”(2020YFD1100701);The Young Scholar Training Program of Zhongyuan University of Technology “Physical prediction model of regional scale landslides based slope unit”(2020XQG13)

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Abstract

Identification of the landslide deformation stage is a key aspect of landslide warning systems. However, many displacement curves lack the obvious characteristics of the three stages, making it challenging to identify the deformation stages of landslides. To overcome the defects of the Saito method, we proposed a method to extract the deformation stages based on a morphology analysis. A total of 1944 deformation stages were identified from the GNSS surface-displacement monitoring database to form a big data environment. Then, we analyzed the spatial distribution of the displacement stages of various lithologic zones in China and used cluster analysis to develop multi-stage warning criteria for deformation stages. The spatial probability and duration of each warning level were also discussed in this study. Analysis results indicated that the power law adequately described the distribution of daily deformation rate for each lithologic region, with daily deformation rates below 10 mm/d accounting for the majority of observations. Cluster analysis revealed that the number of deformation stages within the “none”, “blue”, “yellow”, “orange”, and “red” warning levels also followed the power rule for each lithologic region. It should be noted that the warning threshold of the deformation rate decreased from lithology 1 to lithology 4 at the same warning level. According to the duration analysis of the deformation stage, the longest-lasting daily rate was 0.30~2.14 mm/d with a duration of 120.22~160.96 days; whereas the shortest-lasting daily rate was 2 734.18~31 770.00 mm/d with a duration of 0.004 3~0.020 0 days. In this study, we analyzed the spatial distribution and early-warning criteria of landscape development stages in a big data environment, which could provide a scientific foundation and direction for the development of an intelligent landslide warning model.

Key words： Deformation stage; Morphology; Displacement monitoring curve; Daily deformation rate; Warning threshold

Cite this article

Kai WANG , Shaojie ZHANG , Juan MA , Hongjuan YANG , Dunlong LIU , Chaoping YANG . Research on the Spatial Distribution Law and Early-Warning Criteria of Landslide Displacement Stages in a Big Data Environment[J]. Advances in Earth Science, 2022 , 37(10) : 1054 -1065 . DOI: 10.11867/j.issn.1001-8166.2022.042

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