Effect of two succesive check dams on debris flow deposition

Farouk Maricar, Haruyuki Hashimoto, Shinya Ikematsu, Tomohiro Miyoshi

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

3 Citations (Scopus)

Abstract

This paper describes the effect of two successive check dams on the debris flow event which occurred on 21 July, 2009 in Hofu City, Yamaguchi Prefecture, Japan. The debris flow event caused sediment deposition in the check dams in the Tsurugi and Hachimandani River. In the former river with two successive closed-check dams, driftwood did not accumulate in the check dams but in the central region of the river bend. In the latter river with two successive open-check dams, driftwood accumulated in the opening of the check dams so that the accumulation obstructed the sediment transport to the downstream direction. The upstream check dams in these rivers have sediment deposition profile of around 2°, whereas the downstream ones have deposition profile of around 1.3°. The ratio of sediment deposition volume in the downstream check dams to that in the upstream ones is 0.3:1. The total amount of sediments trapped by the two successive check dams can be estimated at around 9,500 m 3 in each river. Specific sediment runoff volume from the mountainous areas is q s = 6,800 (m 3/km 2).

Original languageEnglish
Title of host publication5th International Conference on Debris-Flow Hazard Mitigation
Subtitle of host publicationMechanics, Prediction, and Assessment
Pages1073-1082
Number of pages10
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

Fingerprint Dive into the research topics of 'Effect of two succesive check dams on debris flow deposition'. Together they form a unique fingerprint.

  • Cite this

    Maricar, F., Hashimoto, H., Ikematsu, S., & Miyoshi, T. (2011). Effect of two succesive check dams on debris flow deposition. In 5th International Conference on Debris-Flow Hazard Mitigation: Mechanics, Prediction, and Assessment (pp. 1073-1082). (International Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment, Proceedings). https://doi.org/10.4408/IJEGE.2011-03.B-116