论文部分内容阅读
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。
Aiming at the formation mechanism and characteristics of shallow landslide hazards in the hilly and mountainous regions of South China, the influencing factors of landslide risk are mainly studied and screened, and the index system of risk analysis of shallow landslides in hilly and mountainous regions and the division method are proposed. Based on the occurrence mechanism of shallow landslide, the slope unit is selected as the basic unit of landslide disaster risk zoning in mountainous area, and the division of units by DEM is completed. Nine factors that influence the formation of landslide hazard, such as relief, slope, aspect, geotechnical features, stratigraphic lithology, weathered layer thickness, reclamation slope strength, residential quarter slope strength and road slope slope strength, The risk index of landslide hazards in mountainous area is set as the indicator of vulnerability by road density, construction intensity and reclamation intensity index, and a risk assessment index system of shallow landslide hazard is established. Finally, risk assessment and zoning are carried out through the risk assessment model.