Morphological characteristics and conditions of drainage basins contributing to the formation of debris flow fans: an examination of regions with different rock strength using decision tree analysis
Research Institute of Energy, Environment and Geology, Industrial Technology and Environment Research Department, Hokkaido Research Organization, Sapporo, 060-0819, Japan
Satoshi Ishimaru
Research Institute of Energy, Environment and Geology, Industrial Technology and Environment Research Department, Hokkaido Research Organization, Sapporo, 060-0819, Japan
Fumitoshi Imaizumi
Faculty of Agriculture, Shizuoka University, Shizuoka, 422-8529, Japan
Gentaro Kawakami
Research Institute of Energy, Environment and Geology, Industrial Technology and Environment Research Department, Hokkaido Research Organization, Sapporo, 060-0819, Japan
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Total article views: 2,701 (including HTML, PDF, and XML)
Thereof 2,617 with geography defined
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Total article views: 1,684 (including HTML, PDF, and XML)
Thereof 1,647 with geography defined
and 37 with unknown origin.
Total article views: 1,017 (including HTML, PDF, and XML)
Thereof 970 with geography defined
and 47 with unknown origin.
Morphological conditions of drainage basins that classify the presence or absence of debris flow fans were analyzed in areas with different rock strength using decision tree analysis. The relief ratio is the most important morphological factor regardless of the geology. However, the thresholds of morphological parameters needed for forming debris flow fans differ depending on the geology. Decision tree analysis is an effective tool for evaluating the debris flow risk for each geology.
Morphological conditions of drainage basins that classify the presence or absence of debris flow...
