A landslide dam breach induced debris flow ? a case study on downstream hazard areas delineation

Chen, Chien-Yuan; Chen, Tien-Chien; Yu, Fuliang; Hung, Fong-Yi

doi:10.1007/s00254-004-1137-6

Cited by 37 publications

(21 citation statements)

References 9 publications

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“…Typhoon Xangsane in 2000 induced debris flows at the Dacukeng stream of Taipei County in northern Taiwan. More than 20 houses were affected and there were eight victims attributed to a landslide dam breaching that induced debris flow (Chen et al, 2004a). After the Chi-Chi earthquake and the additional impact of Typhoon Xangsane, the number of streams with potential for debris flow in Taiwan increased from 485 to 722 according to field investigations by SWCB.…”

Section: Fig 1 Track Of Typhoons That Affected Taiwan In Recent Yearsmentioning

confidence: 99%

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A web-based decision support system for slopeland hazard warning

Chen

Shu

et al. 2006

Environ Monit Assess

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A WebGIS decision support system for slopeland hazard warning based on real-time monitored rainfall is introduced herein. This paper presents its framework, database, processes of setting up the threshold line for debris flow triggering and the calculation algorithm implemented in the system. The web-based GIS via the Microsoft Internet Explorer is designed for analysis of areas prone to debris flows outburst and landslides during torrential rain. Its function is to provide suggestions to commander for immediate response to the possibility of slopeland hazards, and determine if pre-evacuation is necessary. The defining characteristics of the internet-based decision support system is not to automatically show the dangerous areas but acts as part of the decision process via information collection to help experts judge the prone debris flow creeks and the tendency of landslides initiation. The combination with real-time rainfall estimation by the QPESUMS radar system is suggested for further enhancement.

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Section: Fig 1 Track Of Typhoons That Affected Taiwan In Recent Yearsmentioning

confidence: 99%

“…The debris flow potentially endangered downstream areas were delineated according to the historical hazard areas, numerical modeling and field investigations Chen et al (2004a). andYu et al (2006b) also defined the endangered downstream areas from debris flow using GIS.…”

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confidence: 99%

A web-based decision support system for slopeland hazard warning

Chen

Shu

et al. 2006

Environ Monit Assess

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“…The number of natural hazards has been increasing since the 1999 M L 7.6 earthquake that initiated large landslides at Chaolin (Chigira et al 2003;Chen et al 2003) and Chiufengershan (Shou and Wang 2003;Chang et al 2005;Wu et al 2005), and massive amount of sediment yields were deposited at the lower reach (Hovius et al 2000;Chen et al 2004). The subsequent typhoon impacts induced more slopeland-related hazards.…”

Section: Introductionmentioning

confidence: 98%

Characteristics analysis for the flash flood-induced debris flows

Chen

et al. 2008

Nat Hazards

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Typhoon Haitang caused landfall on Taiwan during 15-21 July, 2005 and brought 2,279 mm of maximum cumulative rain with a maximum intensity of 176 mm/ h. The torrential rain was mainly distributed from the central mountain range to southern Taiwan and triggered 222 slopeland-related hazards. Among the hazard events, there were 17 debris flows, 157 cases of traffic cut-off, three large-magnitude deep-seated landslides, and 10 villages isolated in the off-track mountainous areas. The debris flows initiated in southern Taiwan were associated with torrential rain, short channel length (<2 km), and small basin area (<3 km(2)), and were speculated to be induced by flash flood. These flash flood-induced debris flows have a higher rainfall intensity-duration threshold for initiation than in other areas. The deep-seated landslides, isolated villages due to traffic cut-off in off-track mountain areas, and recurrent hazards in areas affected by the ML 7.6 Chi-Chi earthquake in 1999 are characteristics of slopeland hazards in Taiwan in recent years. One of the most urgently needed mitigation strategies in response to slopeland hazards is the plan for enhancing self-rescue disaster resistance in off-track mountainous villages in Taiwan

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“…As a result, the triggered torrent magnitudes and intensities are much higher. (2) Secondly, unlimited sediment supply -amplified by a multi-hazard situation such as translational landsliding of the slopes in the upper part of the torrent catchments [16], which leads to a temporal channel blocking and a subsequent erosion with a high flood hydrograph [17] -may result in process patterns other than those observed in the European Alps so far.…”

Section: Limitations Of Transfermentioning

confidence: 99%

Magnitude and frequency: challenges for the assessment of vulnerability to geomorphic hazards

Fuchs

Keiler

Tsao³

2012

Risk Analysis VIII

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In natural hazard research, risk is defined as a function of (1) the probability of occurrence of a hazardous process, and (2) the assessment of the related extent of damage, defined by the value of elements at risk exposed and their physical vulnerability. Until now, various works have been undertaken to determine vulnerability values for objects exposed to geomorphic hazards such as mountain torrents. Yet, many studies only provide rough estimates for vulnerability values based on proxies for process intensities. However, the deduced vulnerability functions proposed in the literature show a wide range, in particular with respect to medium and high process magnitudes. In our study, we compare vulnerability functions for torrent processes derived from studies in test sites located in the Austrian Alps and in Taiwan. Based on this comparison we expose needs for future research in order to enhance mountain hazard risk management with a particular focus on the question of vulnerability on a catchment scale.

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A landslide dam breach induced debris flow ? a case study on downstream hazard areas delineation

Cited by 37 publications

References 9 publications

A web-based decision support system for slopeland hazard warning

A web-based decision support system for slopeland hazard warning

Characteristics analysis for the flash flood-induced debris flows

Magnitude and frequency: challenges for the assessment of vulnerability to geomorphic hazards

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