Journal of the Japan Society of Erosion Control Engineering, Vol.60,No.1,2007
Evaluation of the danger of debris]flow torrents in view of the effect
value of measure constructions using Support Vector Machine
Hiroyuki OHISHI, Yeboon YUN, Hirotaka NAKAYAMA, Kohei FURUKAWA
Abstract
Reducing the potential hazard of sediment]related disasters is a raging issue
in Japan. In reality the counter]measures against the disasters are not progressing
fast enough as expected. Therefore, the most important matter is to find a way
to measure that can attain maximum effect with minimum expense by making precise
evaluation on the level of potential danger of each dangerous spot and then comparing
the measured effects with one and another. Takemoto et al. set the level of potential
danger of debris flow, using the rough set theory based on desk work data and
applied it to the debris]flow torrent in Nagasaki caused by heavy rain in 1982.
However, their evaluation of the level of potential danger using the rough set
theory has its own limitations ]] only applicable to the data when the data of
debris flow falls under the definition of the occurrence or non]occurrence. Furthermore,
the effect of the measures was not mentioned. In this study, using a Support Vector
Machine, accurate evaluation of potential danger on debris flow, which includes
the effects of present measures, is carried out.
Key wordsFSupport Vector Machine, debris]flow torrents, evaluation of the danger,
rough set theory
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