地质通报2025，Vol.44Issue(12)：2308-2318,11.DOI:10.12097/gbc.2024.09.003
基于斜坡单元的定性—半定量地质灾害易发性评价研究——以四川遂宁市安居区为例
Qualitative-semi-quantitative evaluation of geological hazard susceptibility based on slope units:A case study of Anju District,Suining City,Sichuan Province
摘要
Abstract
[Objective]Geological hazard investigation and evaluation based on slope units have emerged as a crucial approach in China in recent years for detailed surveys in high-incidence and frequent-occurrence areas.The rational delineation of the number of slope units holds significant importance for subsequent hazard investigation,evaluation,and routine management.[Methods]This study proposes an integrated slope unit delineation scheme based on an analysis of the maximum and ideal number of inhabited slopes that can be effectively investigated and managed by survey administrators,combined with an improved curvature watershed method.Subsequently,8 and 7 secondary evaluation factors were selected for rock slopes and soil slopes,respectively.A qualitative-semi-quantitative evaluation model was employed to explore a geological hazard susceptibility evaluation method basedon slope units.[Results]Using the integrated slope unit delineation scheme,14480 slope units were identified in Anju District,Suining City,including 13,071 inhabited slope units,897 uninhabited slope units,and 512 flat land units.Applying an Analytic Hierarchy Process(AHP)-based qualitative-semi-quantitative evaluation model,susceptibility was assessed for each slope unit.Results indicate 196 medium-susceptibility units and 14284 low-susceptibility units,accounting for 1.24％ and 98.76％ of the total area,respectively.[Conclusions]When conducting geological hazard susceptibility evaluations based on slope units,it is essential to balance the subjectivity of survey management capacity with the objectivity of theoretical models,ensuring evaluation outcomes better serve slope hazard prevention at the county level.The AHP-based qualitative-semi-quantitative model using slope units outperforms grid-based information value models in result quality.This method is suitable for county-level 1:10000 slope unit geological hazard evaluations.关键词
斜坡单元/地质灾害/易发性评价/层次分析法/有人斜坡/四川Key words
slope unit/geological hazards/susceptibility evaluation/AHP/inhabited slope/Sichuan Province分类
天文与地球科学引用本文复制引用
周学铖,徐争强,胡祎,朱友欢,任恩..基于斜坡单元的定性—半定量地质灾害易发性评价研究——以四川遂宁市安居区为例[J].地质通报,2025,44(12):2308-2318,11.基金项目
四川省地质灾害防治基金项目《遂宁市安居区全域斜坡地质灾害隐患风险详查》(编号:N5109042022000009)、四川省地质调查研究院基金项目《基于气象预报的地质灾害预警预报研究》(编号:SDDY-Z0022011)Supported by Sichuan Geological Hazard Prevention Fund Project(No.N5109042022000009)and the Project of Sichuan Institute of Geological Survey(No.SDDY-Z0022011) （编号:N5109042022000009）
