Debris flows and landslides caused by Typhoon Morakot in Taiwan

Chyan-Deng Jan, Yu Chao Hsu, Ji Shang Wang, Wen Shun Huang

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

7 Citations (Scopus)

Abstract

Typhoon Morakot was "born" on August 4, 2009 at approximately 22.4° N and 133.8° E in the North Pacific Ocean, about 1,000 km far from northeastern Philippines, moving west at a speed of 10-30 km/hr towards Taiwan, landing on Hualien, eastern Taiwan on August 7, and then moving across over northwestern Taiwan on August 8 with a wind speed up to 40 m/s. Unexpectedly, Typhoon Morakot brought severe rainfalls and caused catastrophic disasters, such as a large number of debris flows, shallow landslides, deep-seated landslides, debris dams and inundations in the mountainous areas of central and southern Taiwan. The catastrophic disasters killed more than 700 people. The rainfall brought by Typhoon Morakot was record-breaking, not only on rainfall amount and (Graph Presented) rainfall duration but also on total area covered with high rainfall. For example, the maximum 1-hour, 12-hour, 24-hour and 48-hour rainfalls at Alishan rainfall station were 123 mm, 934 mm, 1623 mm and 2,361 mm, respectively. This paper will report the rainfall conditions when the debris flows and landslides occurred and the characteristics of debris flows in Gaoping river watershed basing on the data of field investigations and satellite image analyses.

Original languageEnglish
Title of host publication5th International Conference on Debris-Flow Hazard Mitigation
Subtitle of host publicationMechanics, Prediction, and Assessment
Pages675-683
Number of pages9
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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