| 龚芯磊,张斌,高金利,杨洪森.基于斜坡单元尺度AHP-信息量模型的重点区域地质灾害风险评价——以贵州省紫云县中部重点区为例[J].贵州地质,2023,40(3):310-320 |
| 基于斜坡单元尺度AHP-信息量模型的重点区域地质灾害风险评价——以贵州省紫云县中部重点区为例 |
| Risk Evaluation of Geological Hazards in Key Regions Based on AHP- Information Quantity Model at Slope Unit Scale——A Central Key Regions in Ziyun County，Guizhou Province is Taken as an Example |
| 投稿时间：2023-04-01 |
| DOI： |
| 中文关键词: 斜坡单元 层次分析法 信息量模型 风险评价 危险性评价 |
| 英文关键词:Slope unit Analytic hierarchy process Information quantity model Risk evaluation Risk assessment |
| 基金项目:贵州省地矿局科研项目资助(黔地矿科合〔2020〕11号)；贵州省第二批20个县(市、区)地质灾害详细调查及风险评价项目资助(GZMC-ZG20201036) 。 |
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| 中文摘要: |
| 以紫云县重点区域为例，通过划分斜坡单元作为评价单元，运用AHP-信息量模型，结合GIS分析建立了基于斜坡单元尺度的重点区域地质灾害风险评价体系。通过选取符合区域孕灾地质条件及地质灾害形成机理的坡度、坡高、地层、斜坡结构、河流距离、构造距离、降雨、人类工程活动等评价因子对重点区域进行地质灾害危险性评价，最后通过叠加易损性评价结果形成不同降雨频率下的地质灾害风险评价成果。基于斜坡单元尺度AHP-信息量模型的地质灾害风险评价相较栅格法和传统信息量法，避免了夸大平坝区及无人区地质灾害风险等级的不合理结果，其充分考虑了评价因子在评价体系中的重要程度及影响情况，且增加了相似孕灾条件下的地质灾害样本以确定信息量值，经验证评价结果准确可靠，同时其成果能做到以斜坡为单元开展地质灾害精准防治。 |
| 英文摘要: |
| In the key regions of Ziyun county，for example，by divided the slope unit as evaluation unit，using the AHP-information quantity model，combined with GIS analysis was established based on the focus of the slope unit scale regional geological hazard risk evaluation systemThe risk assessment of geological disasters in the key regions is carried out by selecting evaluation factors that are in line with regional disaster-prone geological conditions and formation mechanism of geological disasters，such as slope，slope height，strata，slope structure，river distance，structural distance，rainfall and human engineering activitiesFinally，geological disaster risk assessment results under different rainfall frequencies are formed by superposing the results of vulnerability assessmentCompared with the raster method and the traditional information method，the geological hazard risk assessment based on the slope unit scale AHP-information quantity model avoids the unreasonable result of exaggerating the risk level of geological disasters in Pingba area and uninhabited areaIt fully considers the importance and influence of evaluation factors in the evaluation system，and the geological hazard samples under similar disaster-prone conditions are added to determine the information quantity valueIt is proved that the evaluation results are accurate and reliable，and the results can realize the precise prevention and control of geological disasters with slope as the unit |
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