Assessing debris-flow hazard in a watershed in Taiwan

被引：105
|
作者：
Lin, PS
Lin, JY
Hung, JC
Yang, MD
机构：
[1] Chaoyang Univ Technol, Dept Construct Engn, Taichung, Taiwan
[2] Natl Chung Hsing Univ, Dept Civil Engn, Taichung, Taiwan
来源：
ENGINEERING GEOLOGY | 2002年 / 66卷 / 3-4期
关键词：
debris flow; watershed; geographic information system; hazard assessment;
D O I：
10.1016/S0013-7952(02)00105-9
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
This paper presents the results of a pilot study for assessing debris-flow hazards using geographic information system (GIS) techniques. The watershed of the Chen-Yu-Lan River is investigated in this pilot study. Factors that are believed to be critical to the occurrence of debris flow are identified and considered in the assessment of debris-flow hazards. Using the spatial analysis feature of GIS, the impact of these factors, expressed in terms of debris-flow hazard (DH) index, is calculated. By taking a simple summation of all DH indexes according to each factor, the overall debris-flow hazard at a particular watershed may be assessed. The applicability of the proposed approach for analyzing the watershed of the Chen-Yu-Lan River has been confirmed with the field observations in a recent typhoon event. (C) 2002 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：295 / 313
页数：19
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