A STUDY ON THE MECHANISM OF SLOPE STABILITY (II)
Date Issued
2003
Date
2003
Author(s)
DOI
912625Z002019
Abstract
The main object of this study is to assess the landslides caused by torrential
rainfall through physical based single-variable analysis based on GIS technology. The
parameter used to assess rain-induced landslides is the safety factor of infinite slope.
The influence of rainfall is taken into account by using the groundwater depth factor
(m) which is relative to precipitation、porosity and plant cover.
The technology of remote sensing (RS) is used to get temporal information of
landslide events. The landslide susceptibility of the shitou area after the Herb typhoon
(1996) and the Toraji typhoon (2001) were verified using the landslide location data.
Particularly, the Toraji typhoon encroach upon the shitou area after the Chi-Chi
earthquake (1999), so we must decrease the parameter used to assess rain-induced
landslides. The results reveal that satisfactory consistence between the susceptibility
map and the existing data on landslide location can be efficiently obtained through
GIS and physical based single-variable analysis.
Subjects
landslide susceptibility zonation
rainfall
groundwater depth factor
GIS
Shitou
Publisher
臺北市：國立臺灣大學土木工程學系暨研究所
Type
report
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