GIS-based Risk Assessment of Debris Flows in Three-Parallel-River Are

Wang Huan; Ding Ming-tao; Chen Ting-fang

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GIS-based Risk Assessment of Debris Flows in Three-Parallel-River Are

- GIS-based Risk Assessment of Debris Flows in Three-Parallel-River Are
- Bulletin of Soiland Water Conservation Vol. 30, Issue 5, Pages: 167-170(2011)
- 作者机构：
  
  西南科技大学环境与资源学院
- 作者简介：
- 基金信息：
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- Published：2011
- 稿件说明：
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Wang Huan, Ding Ming-tao, Chen Ting-fang. GIS-based Risk Assessment of Debris Flows in Three-Parallel-River Are[J]. Bulletin of Soiland Water Conservation, 2011, 30(5): 167-170.
DOI：

Wang Huan, Ding Ming-tao, Chen Ting-fang. GIS-based Risk Assessment of Debris Flows in Three-Parallel-River Are[J]. Bulletin of Soiland Water Conservation, 2011, 30(5): 167-170. DOI：

摘要

三江并流区位于怒江、澜沧江、金沙江三江并流地带

是中国泥石流灾害频发地区。在分析泥石流灾害特征的基础上

选取坡度、岩性、断裂、植被和人类工程活动作为三江并流区泥石流危险性评价指标。基于ArcGIS平台建立了泥石流危险性评价数据库、图形数据库和属性数据库

通过对各评价因子归一、分级和赋权处理

建立了泥石流危险性评价模型

对三江并流区泥石流危险性进行了评价

得到危险性区划图。研究结果与实际灾情吻合

可为确定减灾目标

优化防灾措施

制定减灾决策等提供重要依据。

Abstract

The three-parallel-river area is referred to as the parallel drainage basins of Nujiang

Lancang and Jinsha rivers

where debris flows occur frequently.Based on analyzing the characteristics of debris flow disasters occurred in this area

five indexes including slope

lithology

fracture

vegetation and human activity

were chosen as the evaluation indices of debris flow hazards.Supported by ArcGIS

databases of debris flow hazard assessment

graphics and attribute tables were established.The study developed models for risk assessment and obtained the hazard zonation map of the area by normalizing

classification and weighting the evaluation factors.The results agreed well with the actual debris flow events and can provide an important basis for identification the potential disaster targets

optimization of disaster prevention measures and disaster reduction policy making

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