土石流災害防治之研究(以南投示範區陳有蘭溪為對象)─子計畫：土石流發生危險度即時分析及評估系統
Date Issued
1999
Date
1999
Author(s)
DOI
882625Z002044
Abstract
The sites for this study were selected at
the places where debris flows had ever
occurred in the Prefecture of Nan-tou. In this
study, a method for determining the critical
rainfall line of debris flow occurrence was
proposed. Thirty high potential streams of
debris flow in the Prefecture of Nan-tou were
used as samples. Then, dangerous factors
affecting the occurrence of debris flow were
examined and analyzed. The results showed
that the land use factor, average slope
steepness of the stream and the percentage of
soil particles greater than sieve No.4 were
relatively highly related to the occurrence of
debris flow. In addition to this, three
dimensional Fisher’s linear discriminant
function was conducted using the dangerous
factors (which passed the examination) of the
13 streams in which debris flows had ever
occurred to establish the equations for
evaluating the critical rainfall line of debris
flow occurrence. Using the equations, the
critical rainfall lines of the watersheds in
which debris flow had never occurred could
also be evaluated too.
SDGs
Publisher
臺北市：國立臺灣大學生物環境系統工程學系暨研究所
Type
report
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