不同降雨工况下嵩县陆浑水库上游地区地质灾害综合评价  

Comprehensive evaluation of geological hazards under different rainfall conditions in the upper reaches of Luhun Reservoir in Songxian County

作　　者：何进 周晓鹏 刘书亚 韩新志 杜晓阳 张豪杰 HE Jin;ZHOU Xiaopeng;LIU Shuya;HAN Xinzhi;DU Xiaoyang;ZHANG Haojie(Henan first Institute of Geological and Mineral Resources Survey Co.,Ltd.,Luoyang 471032,Henan,China;Henan Ecological Environment and Exploration Geochemistry Applied Engineering Technology Research Center,Luoyang 471023,Henan,China;Luoyang Planning Institute of Architectural Design Institute Co.,Ltd.,Luoyang 471032,Henan,China)

机构地区：[1]河南省第一地质矿产调查院有限公司,河南洛阳471023 [2]河南省生态环境与勘查地球化学应用工程技术研究中心,河南洛阳471023 [3]洛阳市规划建筑设计研究院有限公司,河南洛阳471023

出　　处：《矿产勘查》2024年第5期861-871,共11页Mineral Exploration

基　　金：2021年度中央自然灾害防治体系建设补助资金项目(豫财招标采购-2021-929包10)资助。

摘　　要：降雨强度越大诱发地质灾害的频率越大,大中型水库作为集雨中心,其周围地灾环境的风险性更值得深入探讨,研究区陆浑水库属于大I型水库,其上游地区的降雨强度和地灾风险密切相关,至今相关研究尚且薄弱。因此,本研究选取地貌、高程、与水系距离、植被覆盖率等9个评价指标因子,利用ArcGIS对陆浑水库上游地区开展地质灾害综合评价。结合不同降雨频率,以10 m×10 m栅格采用统计模型方法开展危险性评价。最终与综合易损性叠加进行矩阵计算分析,得到研究区域在4种不同降雨工况条件下的风险分区,研究结果显示,在50年一遇的降雨条件下,研究区高危险区面积占比8%,发育地灾点占研究区域的18%,中、低危险区面积占比92%,发育地灾点占研究区域的82%;高风险区面积占比8%,发育地灾点占研究区域的36%,中、低风险区面积占比92%,发育地灾点占研究区域的64%。研究成果可为陆浑水库上游地区日后的地灾预警与防护工作提供有效的科学依据。The greater the rainfall intensity is,the greater the frequency of geological disasters will induced.As the rain collection center of large and medium-sized reservoirs,the risk of the disaster environment around them is more worthy of in-depth discussion.Luhun Reservoir as the research area is a large type I reservoir,the rainfall intensity in its upstream region is closely related to disaster risk,so far,there has been poorly studied in this field.In this study,nine evaluation index factors including landform,elevation,distance from water system,vegetation coverage rate and more were selected,and ArcGIS was used to carry out comprehensive evalua-tion of geological disasters in the upstream area of Luhun Reservoir.Combined with different rainfall frequencies,the statistical model method was used to carry out the risk assessment with 10 m×10 m grid.Finally,the matrix was calculated and analyzed superposed with the comprehensive vulnerability,and the risk zones of the study area were obtained under four different rainfall conditions.The research results showed that,under the condition of rainfall once in 50 years,the area of the study area of high risk area accounted for 8%,and the geological disaster accounts for 18%;the area of medium risk area and low risk area accounted for 92%,and the geological disaster accounts for 82%.The area of high risk area accounted for 8%,and the geological disaster accounts for 36%,and the area of medium risk area and low risk area accounted for 92%,and the geological disaster accounts for 64%.This study provides an effective scientific basis for future ground disaster warning and protection in the upper reaches of Luhun Reservoir.

关 键 词：陆浑水库上游 地质灾害评价 降雨 ARCGIS 嵩县 

分 类 号：X43[环境科学与工程—灾害防治]