Debris flows produced by heavy rains on July 21, 2009 in Hofu City, Japan

Hiroyuki Nagano, Haruyuki Hashimoto, Yoshiaki Kuroda, Hiroki Takaoka

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, we examine the debris flows which occurred in the mountain rivers in Hofu City, Japan on July 21, 2009. We estimate velocity and discharge of the debris flows in the rivers at Manao and Ishihara districts from field survey and numerical simulation. The numerical simulation indicates that the peak discharge is 181 m 3/s in the river at Manao district and 258 m 3/s in the river at Ishihara district. It is found that sediment yield volume by riverside erosion is larger than landslide sediment volume in the both rivers. Although the landslides triggered the debris flow initiation, they did not play the major role for the sediment outflow to the residential areas. The morphological characteristics of the river at Ishihara district increase debris flow discharge

Original languageEnglish
Title of host publication5th International Conference on Debris-Flow Hazard Mitigation
Subtitle of host publicationMechanics, Prediction, and Assessment
Pages725-733
Number of pages9
DOIs
Publication statusPublished - Dec 1 2011
Event5th International Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment - Padua, Italy
Duration: Jun 14 2011Jun 17 2011

Publication series

NameInternational Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment, Proceedings

Other

Other5th International Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment
CountryItaly
CityPadua
Period6/14/116/17/11

All Science Journal Classification (ASJC) codes

  • Water Science and Technology
  • Geotechnical Engineering and Engineering Geology
  • Earth-Surface Processes

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  • Cite this

    Nagano, H., Hashimoto, H., Kuroda, Y., & Takaoka, H. (2011). Debris flows produced by heavy rains on July 21, 2009 in Hofu City, Japan. In 5th International Conference on Debris-Flow Hazard Mitigation: Mechanics, Prediction, and Assessment (pp. 725-733). (International Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment, Proceedings). https://doi.org/10.4408/IJEGE.2011-03.B-079