Citation

Lin PS, Lin JY, Hung JC, Yang MD. Eng. Geol. 2002; 66(3-4): 295-313.

Copyright

(Copyright © 2002, Elsevier Publishing)

DOI

10.1016/S0013-7952(02)00105-9

PMID

unavailable

Abstract

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.