Rainfall conditions result in intensive deep-seated landslides : Rainfall analysis for typhoon No.12 in 2011
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- KINOSHITA Atsuhiko
- Ministry of Land, Infrastructure, Transport and Tourism, Kinki Division
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- KITAGAWA Shinichi
- Ministry of Land, Infrastructure, Transport and Tourism, Kinki Division
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- UCHIDA Taro
- National Institute for Land and Infrastructure Manegement, Ministry of Land, Infrastructure, Transport and Tourism
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- KAIHARA Soichi
- Eight-Japan Engineering Consultants Inc.
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- TAKEMOTO Hiroaki
- Eight-Japan Engineering Consultants Inc.
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- TADAKUMA Noriko
- Eight-Japan Engineering Consultants Inc.
Bibliographic Information
- Other Title
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- 深層崩壊が集中的に発生する降雨条件―平成23年台風12号の降雨分析―
- シンソウ ホウカイ ガ シュウチュウテキ ニ ハッセイ スル コウウ ジョウケン : ヘイセイ 23ネン タイフウ 12ゴウ ノ コウウ ブンセキ
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Abstract
Numerous deep-seated landslides have occurred in southern Wakayama and Nara prefectures, with over 1,000 mm of rainfall caused by typhoon no.12 in 2011, which resulted in a great deal of damage. We need to consider future action for deep-seated landslides, and contemplate evacuation for the occurrence of deep-seated landslides as they have recently increased in incidence. Deep-seated landslides and the rainfall index are dominated by long-term rather than short-term rainfall indicators, but few concrete case studies are available.<br>We studied C-band rainfall mesh data in the southern part of Nara Prefecture after typhoon no.12 to elucidate the rainfall index relevant to deep-seated landslides.<br>We found that a deep-seated landslide happened around the end of the rainfall event after typhoon no.12, and that a deep-seated landslide occurred after 700-800 mm of rainfall fell in 48 hours with at least 900-1,000 mm of total rainfall. However, a clear relationship could not be found for rainfall totals of ≥ 1,400 mm. We did not find a clear relationship between the rainfall index and deep-seated landslides, although a correlation between a higher tendency for a large-scale landslide and a greater number of deep-seated landslides was confirmed in the medium-to long-term rainfall index. We found that the excess probability of rainfall is highly correlated with deep-seated landslide.
Journal
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- Journal of the Japan Society of Erosion Control Engineering
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Journal of the Japan Society of Erosion Control Engineering 66 (3), 24-31, 2013
Japan Society of Erosion Control Engineering
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Details 詳細情報について
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- CRID
- 1390282680456691456
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- NII Article ID
- 130005111353
- 10031200131
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- NII Book ID
- AN0012035X
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- ISSN
- 21874654
- 02868385
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- NDL BIB ID
- 024897336
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed