Bulletin of Surveying and Mapping ›› 2025, Vol. 0 ›› Issue (6): 43-48.doi: 10.13474/j.cnki.11-2246.2025.0608

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Landslide dynamic hazard assessment based on InSAR and information-logistic regression coupling model

WANG Chenyu1, PENG Junhuan1, XUE Yueming1,2, LI Xu1, ZHANG Yan3   

  1. 1. School of Land Science and Technology, China University of Geosciences (Beijing), Beijing 100083, China;
    2. China Institute of Geo-Environment Monitoring, Beijing 100081, China;
    3. Faculty of Information Enginerring, China University of Geosciences (Wuhan), Wuhan 430074, China
  • Received:2024-11-28 Published:2025-07-04

Abstract: In view of the issues of significant discrepancies, poor timeliness, and false negative errors in the results of various landslide hazard assessment models.This paper takes Xiangyun county, Yunnan province as the study area.Firstly, compares the performance of four models:information(I), information-logistic regression(I-LR), long short-term memory(LSTM) and support vector machine(SVM), to determine the most suitable model for landslide hazard assessment. Then, the SBAS-InSAR method is used to process the Sentinel-1 data from both ascending and descending orbits between August 2019 and July 2023, and the surface slope deformation rate is calculated. Finally, the landslide hazard classification and slope deformation rate are combined using a correction matrix to generate the dynamic landslide hazard map.The results show that the I-LR model has better prediction accuracy and stability than the other three models.The landslide dynamic hazard map, generated by combining the I-LR model landslide hazard classification and the InSAR slope deformation rate classification, demonstrates better identification of unstable deformation areas. The proportion of low hazard areas is reduced by 10.35%, while the proportions of lower, medium, and high hazard areas increase by 6.30%, 2.45%, and 1.60%, respectively. This enhances both the timeliness and accuracy of landslide hazard assessment results.

Key words: landslide, hazard mapping, informatics-logistic regression model, SBAS-InSAR

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