地质科技通报2024，Vol.43Issue(6) ：184-195.DOI:10.19509/j.cnki.dzkq.tb20240195

考虑地表形变和土地利用变更的滑坡时空易发性差异分析

Analysis of spatial-temporal variations in landslide susceptibility assess-ment considering surface deformation and land use dynamics

张锦瑞 汪洋 冯霄 李远耀 金必晶 周超 张鑫 邓扬
地质科技通报2024，Vol.43Issue(6) ：184-195.DOI:10.19509/j.cnki.dzkq.tb20240195
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  • 万方数据

考虑地表形变和土地利用变更的滑坡时空易发性差异分析

Analysis of spatial-temporal variations in landslide susceptibility assess-ment considering surface deformation and land use dynamics

张锦瑞 1汪洋 2冯霄 2李远耀 1金必晶 2周超 3张鑫 1邓扬1
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作者信息

  • 1. 中国地质大学(武汉)地质调查研究院,武汉 430074
  • 2. 中国地质大学(武汉)工程学院,武汉 430074
  • 3. 中国地质大学(武汉)地理与信息工程学院,武汉 430074
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摘要

为探究移民迁建城区受人类工程活动影响而产生的滑坡易发性时空变化,以三峡库区云阳县新城区为例,引入滑坡易发性时变指标因子进行滑坡时空易发性差异制图,从而探究迁建城区在城镇化过程中滑坡灾害的时空演化规律.选择Stacking集成模型作为静态易发性评价模型;选取2017年1月16日-2018年8月27日(T1)、2018年9月20日-2021年7月30日(T2)、2021年8月23日-2023年11月17日(T3)3个不同时间跨度的InSAR形变速率和土地利用类型作为时变因子;将时变因子与静态评价结果结合,绘制了不同时间段的易发性差异分布图.研究表明,引入时变因子进行滑坡时空易发性差异分析可以有效反映城市化对滑坡灾害的影响,研究区土地类型由非工程用地转变为工程用地时,滑坡易发性等级普遍上升,2个变化阶段中栅格占比分别为61.3％和67.1％.城区所选典型滑坡的InSAR位移时序曲线的变化趋势与土地类型转变具有较高的时空相关性,进一步验证了该方法的可靠性.本研究提出的研究思路能够在三峡库区移民迁建城区城市化进程中提供有效的防灾减灾依据和区域规划手段.

Abstract

[Objective]To investigate the spatial-temporal variations in landslide susceptibility due to human engi-neering activities in resettled urban areas.[Methods]This study focuses on the new urban area of Yunyang Coun-ty in the Three Gorges Reservoir region.Landslide susceptibility time-varying index factors were introduced to map spatial-temporal susceptibility differences and explore the spatial-temporal evolution of landslide disasters during ur-banization in resettled urban areas.First,the stacking ensemble model was selected as the static susceptibility eval-uation model.Then,the InSAR deformation rates and land use types over three distinct time spans(namely,Janu-ary 16,2017,to August 27,2018(T1),September 20,2018,to July 30,2021(T2),and August 23,2021,to November 17,2023(T3))were selected as time-varying factors.Last,the time-varying factors were combined with the static evaluation results to create susceptibility difference distribution maps for the different periods.[Re-sults]The study revealed that introducing time-varying factors in the analysis of spatial-temporal susceptibility differences effectively reflects the impact of urbanization on landslide disasters.When the land type in the study ar-ea changed from non-engineering land to engineering land,the landslide susceptibility level generally increased,with grid shares of 61.3％and 67.1％in the two change stages,respectively.The temporal trends of the InSAR displacement time series curves for selected typical landslides in urban areas showed high spatial-temporal correla-tions with land type changes,further validating the reliability of this method.[Conclusion]The proposed research approach provides the basis for disaster prevention,mitigation,and regional planning during the urbanization process in resettled urban areas of the Three Gorges Reservoir region.

关键词

移民迁建城区/滑坡易发性/土地利用类型/InSAR/滑坡时空易发性差异分析/地表形变

Key words

resettled urban area/landslide susceptibility/land use type/InSAR/analysis of spatial-temporal vari-ations in landslide susceptibility assessment/surface deformation

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出版年

2024
地质科技通报
中国地质大学（武汉）

地质科技通报

CSTPCDCSCD北大核心
影响因子：1.018
ISSN：2096-8523
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