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ID 151
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title alternative
Consideration of the natural factors in which the flow behavior of debris flows could be controlled
creator
Frusawa, Hideo
subject
coefficient of friction
debris flow
fluidity
NDC
Earth sciences. Geology
abstract
It is very important for the disaster prevention to analyze the factors which influenced on the fluidityof debris flow. We investigated such factors in debris flows occurred around Higashi-Hiroshima in 1999. Weadopted equivalent coefficient of friction and dynamic coefficient of friction to evaluate the fluidity of thedebris flows. As the result of consideration with obtained data, the following things were elucidated: (1) Debrisflow which occurred in the torrent with larger catchment area tends to have large fluidity. (2) In case of eachtorrent, as debris flow moved downwards, dynamic coefficient of friction became smaller. (3) Debris flowstended to lose their fluidity at the places where there were trees, agricultural ponds and tortuosity of the channeletc. (4) The proportion of area occupied by trees is more suitable than the number density of trees as factorsinfluenced on the fluidity of the debris flow. When the proportion of area occupied by trees would becomegreater than some per mills, debris flows at such site could be controlled by the trees.
journal title
Memoirs of the Faculty of Integrated Arts and Sciences, Hiroshima University. IV, Science reports
volume
Volume 28
start page
49
end page
60
date of issued
2002-12
publisher
広島大学総合科学部
contributor
国立情報学研究所
issn
1340-8364
ncid
SelfDOI
language
jpn
nii type
Departmental Bulletin Paper
HU type
Departmental Bulletin Papers
DCMI type
text
format
application/pdf
text version
publisher
department
Graduate School of Integrated Arts and Sciences
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