基于斜坡单元的浅层滑坡风险区划——以华南松岗河小流域为例

发布时间：2018-05-20 15:26

本文选题：公共安全 + 斜坡　；参考：《安全与环境学报》2017年02期

【摘要】：针对华南丘陵山区浅层滑坡灾害的形成机理及特征,对滑坡风险影响因素进行重点研究和筛选,提出了丘陵山区浅层滑坡灾害风险分析指标体系及其区划方法。从浅层滑坡的发生机理出发,选用斜坡单元作为山区滑坡灾害风险区划的基本单元,并利用DEM完成单元的划分。将影响滑坡灾害形成的地形起伏度、坡度、坡向、岩土结构面特征、地层岩性、风化层厚度、开垦切坡强度、居民点切坡强度、道路切坡强度九项因子作为小流域山区滑坡灾害的危险性指标,以道路密度、建设强度和开垦强度指数作为易损性指标,建立浅层滑坡灾害风险评价指标体系。最后,通过风险评价模型进行风险评价和区划。
[Abstract]:In view of the formation mechanism and characteristics of shallow landslide disaster in hilly and mountainous area of South China, the influencing factors of landslide risk are studied and screened, and the index system of risk analysis of shallow landslide disaster and its regionalization method in hilly mountain area are put forward. Based on the occurrence mechanism of shallow landslide, slope unit is selected as the basic unit of landslide risk zoning in mountainous area, and DEM is used to complete the division of the unit. The topographic fluctuation degree, slope direction, rock and soil structure surface characteristics, stratigraphic lithology, weathering layer thickness, slope intensity of reclamation, slope intensity of residential area, which affect the formation of landslide disaster, will be affected. Nine factors of road slope cutting intensity are regarded as dangerous indexes of landslide disaster in mountain area of small watershed, and the index of road density, construction intensity and reclamation intensity is taken as vulnerability index, and the risk evaluation index system of shallow landslide disaster is established. Finally, risk assessment and regionalization are carried out by risk assessment model.
【作者单位】：广州地理研究所广东省地理空间信息技术与应用公共实验室;
【基金】：国家自然科学青年基金项目(41201557,41671506) 广东省科技计划项目(2013B020314003,2014A020218013) 广东省水利科技项目(2011-19)
【分类号】：P642.22

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