欢迎访问现代地质!

现代地质 ›› 2015, Vol. 29 ›› Issue (2): 454-460.

• 地质体稳定性与地质灾害 • 上一篇    下一篇

基于因子-聚类分析的泥石流危险性评价研究—以重庆市北碚区为例

王滨1,2,陈淋册1,赵佩哲1   

  1. (1.石家庄经济学院 水资源与环境学院,河北 石家庄 050031; 2.河北省水资源可持续利用与开发重点实验室,河北 石家庄 050031)
  • 出版日期:2015-04-21 发布日期:2015-06-09
  • 作者简介:王滨,男,教授,1974年出生,地质工程专业,主要从事地下水环境及地质灾害方向的研究。 Email:2020wb@163.com。
  • 基金资助:

    石家庄经济学院博士启动基金项目(124087)。

Study on Risk Assessment of Debris Flow Based on Factor-Clustering  Analysis:A Case Study from Beibei District in Chongqing

WANG Bin1,2, CHEN Lin-ce1, ZHAO Pei-zhe1   

  1. (1.College of Water Resources and Environment, Shijiazhuang University of Economics, Shijiazhuang, Hebei 050031, China; 2.Key Lab of Sustainable Utilization and Exploitation of Water Recourses of Hebei Province, Shijiazhuang,Hebei 050031, China)
  • Online:2015-04-21 Published:2015-06-09

摘要:

重庆市北碚区是泥石流地质灾害主要高发区,其暴发受降雨条件、物源条件、地形地貌、地质构造、沟谷特征和植被等内外因素的制约。为有效评价各泥石流灾害暴发的危险性,依据重庆市北碚区泥石流灾害暴发的诸多影响因素,首先基于因子分析法对30条典型泥石流沟的大量数据进行了主因子判定,确定了地形地貌和物源条件、植被覆盖度、最大降雨量3个主因子,然后利用快速聚类法对各主因子综合得分进行聚类分析,进而根据聚类分析结果判定了各泥石流爆发的危险程度等级。危险性评价结果显示,重庆市北碚区30条泥石流沟中,暴发极度危险的有1条、高度危险的有3条、中度危险的有21条、低度危险的有5条,评价结果与各泥石流灾害爆发的实际情况相吻合。

关键词: 泥石流灾害, 因子分析, 聚类分析, 危险性评价, 北碚区, 重庆

Abstract:

Beibei district in Chongqing City is the primary area where debris flow hazard always occurred, and the outbreaks of debris flows are controlled by the rainfall, material source conditions, geographical conditions,geological structure, valley characteristics, vegetation and other internal or external factors. In this paper, in order to evaluate effectively the outbreak risk of debris flows in Beibei district, according to many factors of debris flows outbreak, and based on the method of factor analysis,massive data of 30 typical debris flows was analyzed, and the three main factors of debris flow were classified, which contains topography and material source conditions, vegetation coverage, maximum rainfall. And then, the clustering analysis about main factors score was carried out by the fast clustering method. Meanwhile, the outbreaks danger degree of debris flow hazard was determined. The evaluation results were consistent with the actual occurrence of these debris flows in Beibei district of Chongqing City, which show that one debris flow is extremely risk, three debris flows are high risk, twenty-one debris flows are moderate risk, and five debris flows are low risk.

Key words:  debris flow hazard, factor analysis, clustering analysis, risk assessment, Beibei district, Chongqing

中图分类号: