陕西省略阳县地质灾害危险性区划评估  

Evaluation of Geological Disaster Hazard Zoning in Lueyang County, ShaanxiProvince

作　　者：封建民 杨波 谢瑞莲 祝苓玉 王艳[4] FENG Jianmin(不详)

机构地区：[1]咸阳师范学院资源环境与历史文化学院,陕西咸阳712000 [2]西安邮电大学计算机学院,陕西长安710127 [3]佛坪县林业局,陕西佛坪723400 [4]陕西省榆林市榆阳区农业技术推广中心,陕西榆林719000

出　　处：《地理空间信息》2021年第2期78-82,120,I0006,共7页Geospatial Information

基　　金：国家自然科学基金资助项目(41661042);教育部社科青年基金资助项目(19YJCAH204);陕西省普通高等学校优势学科专项资金建设项目(0602);咸阳师范学院科研项目(XSYK17017);大学生创新项目(201828030、2018087)。

摘　　要：汶川地震后陕西省略阳县地质灾害增加,为了评估震后略阳县地质灾害风险等级和范围,利用GIS、RS技术结合信息量模型在ArcGIS中对地质灾害危险等级进行了评估。结果表明76.50%的地质灾害发生在坡度15°~40°范围内;从地质岩组的角度分析,松散岩组地区是灾害发生的集中地区,占比达33.03%;从地形起伏度的角度来看,地质灾害的发生主要集中在小起伏地区(20~75 m),占区内总灾害数量的79.4%;在距离水系、断层较近的地区次生灾害发生的可能性越大,距离越远灾害发生概率越少;灾害点的空间分布和危险度分区有较强的相关性。信息量模型结合GIS技术评价地质灾害结果客观,研究成果可以为当地的地质灾害防治提供参考依据。The geological disaster spots of Lueyang County in Shaanxi Province have increased to 255 after Wenchuan earthquake in 2008.In order to assess the level and scope of geological disaster spots of Lueyang County,we used GIS and RS technology combined with information model to evaluate the hazard level of geological disasters in ArcGIS.The results show that 76.50%of geological disaster spots are in the slope of 15°~40°.The geological disaster spots are focused on the range of loosen stratum,accounting for 33.03%.From the viewpoint of relief,the geological disaster spots are mainly in the small relief area(20~75 m),accounting for 79.4%.The geological hazards of Lueyang County concentrated distribute along the river valley,which are consistent with the distribution of active zone and tectonic belt.There is a strong correlation between the spatial distribution of geological disaster spots and hazard zoning.The study shows that the information method combined with GIS is objective and can provide valid basis for geological disaster prevention of the research area.

关 键 词：地质灾害 危险性区划 信息量模型 ARCGIS 略阳县 

分 类 号：P208[天文地球—地图制图学与地理信息工程]