The variability in time of the occurrence conditions of debris flow after catastrophic typhoons and earthquakes: A theoretical explanation with experimental tests

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

1 Citation (Scopus)

Abstract

In Taiwan, large and often catastrophic typhoons and earthquakes are both factors to trigger serious landslides in mountains. The presences of large amounts of sediments due to the landslides increase the occurrence of debris flow. Base on post-event data, the threshold of debris flow occurrence decreases soon after an earthquake indicating a fast recovery. A relationship of debris flow occurrence from EGASHIRA (1997) is applied, which shows fine sediment plays an important role with debris-flow development and occurrence. In this paper, a series mobile-bed experiments were done to access the influence of the concentration change from upstream discharge with fine/coarse particle. Two variables were recorded in the experiment, which were depth-ratio (sediment layer depth/ total depth), and the sediment discharge. With comparison with theoretical relationship, the result shows the occurrence condition varied with the ratio of fine sediment.

Original languageEnglish
Title of host publication5th International Conference on Debris-Flow Hazard Mitigation
Subtitle of host publicationMechanics, Prediction, and Assessment
Pages143-148
Number of pages6
DOIs
Publication statusPublished - 2011 Dec 1
Event5th International Conference on Debris-Flow Hazards Mitigation: Mechanics, Prediction, and Assessment - Padua, Italy
Duration: 2011 Jun 142011 Jun 17

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
Period11-06-1411-06-17

All Science Journal Classification (ASJC) codes

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

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