摘要
为了探索区域泥石流危险性评估方法,在综合分析国内外泥石流危险性评估方法的基础上,通过野外地质灾害详细调查,对其影响因素进行详细分析,利用基于模糊数学的层次分析方法,选取地形因素、松散物质、降雨因素、植被因素等7个评价因子,完成了对研究区内泥石流灾害进行危险性评估,并探讨了区域泥石流灾害危险性评估方法及技术流程。根据评价结果:泥石流灾害发育主要受控于地形地貌、松散物储量及降水3个要素,其中地形地貌要素是泥石流灾害发生的决定性因素;研究区内高危险的泥石流沟4条,主要为矿渣泥石流和沟谷泥石流;中危险的8条;低危险的泥石流沟20条;弱危险的泥石流7条。因此,应根据评价结果采取加强监测、适当工程治理或搬迁避让等方法进行危险性控制,以便达到防灾减灾的目的。
This paper discussed the hazard assessment of debris flow in Fengxian County, Shaanxi Province using hierarcly analysis process based on fuzzy mathematics methods. According to the debris flow hazard assessment practice at home and abroad, as well as the geo-hazards detailed field survey, this paper analyzed the influence elements and chooses seven factors as evaluation factors such as terrain factor, loose material, rainfall, vegetation and so on. Then, the paper completes the debris flow hazard assessment and explores the regional debris flow evaluation methods and work flow. The results indicate that, the development of debris flow controlled by topography, loose material reserves and rainfall, in which topography is a decisive factor; in the study area, there are four debris flows at high risk, which are mainly slag mudflow and ravine mudflow, and eight at moderate risk, twenty at low risk and seven at weak risk. Therefore, it is necessary for the local government to strengthen monitoring, take engineering treatment, removing and avoiding methods for disaster prevention and reduction.
出处
《自然灾害学报》
CSCD
北大核心
2014年第1期121-131,共11页
Journal of Natural Disasters
基金
国家"十一五"科技支撑课题(2006BAC04B05)
中国地质调查局项目(1212010640401)
关键词
凤县
泥石流
危险性评估
Fengxian County
debris flow
hazard assessment
