摘要
[目的]评估湖南省滑坡发生的风险和损失等级,丰富湖南省滑坡防治理论及方法,为该地减少滑坡灾害提供科学依据。[方法]基于GIS技术和层次分析法(AHP)以DEM、遥感、气象、岩性、地震点等数据为支撑,分别从危险性评价和易损性评价两方面对湖南省滑坡风险进行评估。[结果]①湖南省滑坡风险等级大多处于中低风险等级,少部分为较高风险或高风险等级,中度风险等级最多,占全省面积的31.31%,其余依次为较低、较高、低和高风险等级,其比例分别是24.92%,22.09%,13.88%和7.79%;②从空间格局来看,风险性等级整体呈现出中部、东南高,西南、东北低的空间分布特征;③湖南省滑坡损失等级整体呈现出东高西低,局部不均匀的分布特征。[结论]湖南省滑坡灾害的管理主要应从预防和整治两方面进行,依据各地区常见滑坡类型,制定有针对性的区域差异化防治预案。
[Objective]The risk and loss of landslides in Hunan Province was evaluated to enrich the theories and methods of landslide prevention in Hunan Province in order to provide a scientific basis for reducing landslide disasters in this area.[Methods]Based on GIS technology and analytic hierarchy process(AHP),with the support of DEM,remote sensing,meteorology,lithology,seismic points and other data,the risk assessment of landslides in Hunan Province was evaluated from two aspects:risk assessment and vulnerability assessment.[Results]①Most of the landslide risk grades in Hunan Province are in the middle and low risk grades,and a few of them are at high risk level.The medium risk level is the most,accounting for 31.31%of the whole province.The rest are low,moderate,relative high,and high risk levels,accounting for 24.92%,22.09%,13.88%and 7.79%,respectively.②From the perspective of spatial pattern,the characters of the overall risk grade distribution are low in the northeast and southwest,while high in the southeast and middle.③The loss level of Hunan Province is generally low in west and high in east,with middle in moderate and uneven distribution locally.[Conclusion]The landslide disaster in Hunan Province should be managed from two aspects of prevention and control,according to the common types of landslide in prefecture-level cities in Hunan Province,targeted regional different prevention and control plan should be formulated.
作者
申怀飞
杨清洁
魏亿鑫
闫旭倩
闵家森
吴宇琛
Shen Huaifei;Yang Qingjie;Wei Yixin;Yan Xuqian;Min Jiasen;Wu Yuchen(School of Urban and Environmental Sciences,Xuchang University,Xuchang,He'nan 461000,China)
出处
《水土保持通报》
CSCD
北大核心
2020年第6期146-152,I0007,共8页
Bulletin of Soil and Water Conservation
基金
河南省教育厅人文社会科学研究项目(2020-ZZJH-426)
河南省高等学校重点科研项目(21A170019)
许昌学院优秀青年骨干教师项目
许昌学院重点科研项目(2020ZD004)。
关键词
滑坡
GIS空间分析
风险评估
AHP分析法
landslide
GIS spatial analysis
risk assessment
analytic hierarchy process
