A Debris Flow Hazard Monitoring and Early Warning System Based on Formation and Motion Processes of Debris Flow

YANG Chenglin1 DING Haitao2 CHEN Ningsheng2

(1.Key Lab of Mountain Hazards and Surface Processes, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, Sichuang Province 610041)
(2.Key Lab of Mountain Hazards and Surface Processes, Institute of Mountain Hazards and Environment, Chinese Academy of SciencesKey Lab of Mountain Hazards and Surface Processes, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, Sichuang Province 610041)
【Novelty】Based on formation mechanism of debris flow, the monitoring and early warning system depending on motion process monitors the characteristic parameters at all phases, establishes the corresponding disaster classification by analyzing all threshold values, and thus builds the comprehensive monitoring and early warning system which covers the whole area. This proposed monitoring and early warning system can provide a reference on monitoring and early warning of the debris flow in small river basins, especially for areas (e.g., Wenchuan earthquake area) where high-frequency and massive debris flow occurs.

【Abstract】According to the massive total volume, group-occurring debris flows in the Wenchuan earthquake stricken area, the monitoring and early warning system will be an economic and effective measure. Based on analysis of past performance of debris flow early warning and existing problems, this paper proposed a new debris flow hazard monitoring and early warning system based on the formation and motion mechanism of debris flow. The new system consists of rainfall monitoring, fluid level monitoring, pore-water pressure monitoring, soil moisture monitoring, ground vibration monitoring, and video monitoring. And the early warning levels were established after the comprehensive analysis of the threshold values of all these monitorings. It would be suitable to use this comprehensive monitoring and early warning system for protecting debris flow threatened areas in the Wenchuan earthquake stricken area.

【Keywords】 Earthquake; Debris Flows; Formation Process; Motion Process; Monitoring and Early Warning System;

【DOI】

【Funds】 “Twelfth-Five” National Key Technology Research and Development Program (Grant No. 2011BAK12B02) Young Scientists Fund of the National Natural Science Foundation of China (Grant No.41201555) Young Scientists Fundof of Mountain Hazards and Environment, CAS “1-3-5” Project of Institute of Mountain Hazards and Environment, CAS

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    References

    [1]Arattano M.On the use of seismic detectors as monitoring and warning systems for debris-flows.Nat.Haz.1999,20:197-213.

    [2]Zhang S.A comprehensive approach to the observation and prevention of debris flows in China.Nat.Haz,1993,7:1-23.

    [3]Itakura Y,Fujii N,Sawada T.Basic characteristics of ground vibration sensors for the detection of debris-flow.Phys.Chem.Earth(B).2000,25:717-720.

    [4]Hurlimann M,Rickenmann D,Graf D.Field and monitoring data of debris-flow events in the Swiss Alps.Canadian Geotechnical Journal,2003,40:161-175.

    [5]Uddin M S,Inaba H,Itakura Y,et al.Adaptive computer-based spatial filtering method for more accurate estimation of the surface velocity of debris-flow.Appl.Opt.1999,38:6714-6721.

    [6]Arattano M,Grattoni P.Using a fixed video camera to measure debris-flow surface velocity.In:Wieczorek G F and Naeser N D(Eds.).Debris-Flow Hazards Mitigation:Mechanics,Prediction,and Assessment.Proc.and Intern.Conf.,Taipei,Taiwan,16-18 August 2000,Rotterdam,Balkema Press.2000.273-281.

    [7]Itakura Y,Inaba H,Sawada T.A debris-flow monitoring devices and methods bibliography.Natural Hazards and Earth System Sciences.2005,5:971-977.

    [8]YAO Lingkan.The study of critical precipitation based on the frequency of debris flow and rainstorm[J].Bulletin of Soil and Water Conservation,1988,2(4):72-77.(in Chinese)

    [9]TAN Wanpe,HAN Qingyu.Study on regional critical rainfall indices of debris flow in Sichuan province[J].Journal of Catastrophology,1992,7(2):37-42.(in Chinese)

    [10]ZHOU Jinxing,WANG Lixian.A review on the technique of forecasting and alarming flush flood and debris flow disaster[J].Journal of Mountain Research,2001,19(6):527-532.(in Chinese)

    [11]YE Huaqiang.The study on touch warning sensor of debris flow[C].Theories and Practice on Debris Flow Prevention.Chengdu:Southeast Jiao tong University Press,1991:95-105.(in Chinese)

    [12]CHEN Jingri,ZHANG Shucheng.The study of debris flow earthquake sound and NJ-2 radio telemetry siren of debris flow[C]∥Second National Debris Flow Conference Proceeding.Beijing:Science Press,1991:36-41.(in Chinese)

    [13]KANG Zhicheng,HU Pinghua.Debris flow warning theory based on the flow depth and the instrument[C]∥Second National Debris Flow Conference Proceeding.Beijing:Science Press,1991:42-46.(in Chinese)

    [14]TANG Chuan.Approaches on debris flow hazard warning issue associated with urban area[J].Advances in Earth Science,2008,23(5):546-552.(in Chinese)

    [15]YU Kun.The study of debris flow warning system and it’s application to south section of Chengdu-Kunming railway[J].Journal of Railway Engineering Society,1986,3(4):18-25.(in Chinese)

    [16]ZHANG Yuan.The application of remote sensing technique in debris flow forecast[J].Railway Aerial Survey,1982(3):17-20.(in Chinese)

    [17]YIN Kun long,ZHANG Guirong,GONG Rixiang,et al.A real time warning system design of geo-hazards supported by Web-GIS in Zhejiang Province,China[J].Hydrogeology and Engineering Geology,2003(3):19-24.(in Chinese)

    [18]CUI Peng.Gray predication of regional debris flow activity:a case study on Jinzhou[J].Journal of Soil and Water Conservation,1993,7(3):11-16.(in Chinese)

    [19]ZHAO Ling.Expert system of predestinate and forecast of debris flow along Chengdu-Kunming railway in Sichuan province[J].Journal of Mountain Research,1990,8(2):89-93.(in Chinese)

    [20]YE Huaxiang.Reducing the threats of debris flow to moving trains with hid of the debris flow information network[J].Journal of Catastrophology,1996,11(2):32-36.(in Chinese)

    [21]YAO Lingkan,SHEN Shouchang.Study of railway debris flow prevention and mult-mitigation strategies[J].Journal of Natural Disasters,1995,4(S):173-181.(in Chinese)

    [22]LU Xiaobing,LI Deji.Debris flow forecast based on neural net[J].Journal of Natural Disasters,1996,5(3):47-50.(in Chinese)

    [23]LIU Chuanzheng.Study of geo-hazards forecasting and warning engineering system[J].Hydrogeology and Engineering Geology,2000,27(4):1-4.(in Chinese)

    [24]YAO Xuexiang,XU Jing.Multi-discipline forecast and warning engineering system on sediment-related disasters[J].Engineering Science,2004,6(6):9-15.(in Chinese)

    [25]Iverson R M,Reid M E,Husen R G.Debris-flow mobilization from landslides.Annu.Rev.Earth Planet.Sci.1997,25:85-138.(in Chinese)

    [26]WEI Fangqiang,CUI Peng,ZHONG Dunlun.Classification of debris flow forecast and its present status and development in research[J].Journal of Natural Disasters,2004,13(5):10-15.(in Chinese)

    [27]CHEN Ningsheng,YANG Chenglin,ZHOU Wei,et al.Investigation technology for debris flows[M].Beijing:Science Press,2011:3-21.(in Chinese)

    [28]Chen Ningsheng,Yang chenglin,Zhou Wei,et.al.The critical rainfall characteristics for torrents and debris flows in the Wenchuan Earthquake stricken area[J].Journal of Mountain Science,2009,6(4):362-372.

    [29]WEI Fangqiang,HU Kaiheng,CHEN Jie.Determination of effective antecedent rainfall for debris flow forecast[J].Journal of Mountain Science,2005,23(4):453-457.(in Chinese)

    [30]CUI Peng,YANG Kun,CHEN Jie.Relationship between occurrence of debris flow and antecedent precipitation:taking the Jiangjia Gully as an example[J].Journal of Soil and Water Conservation,2003,1(1):11-15.(in Chinese)

    [31]Johnson A M,Rodine J R.Debris flow[C]∥Brunsden D,Prior D B(Eds.).Slope Instability,Wiley,Chichester,1984:257-357(chap.8)

    [32]Sassa K.The mechanism of debris flow[C]∥Proceedings ofⅥInternational Conference on Soil Mechanics and Foundation Engineering,San Francisco,A A Balkema,Rotterdam,the Netherlands,1985:1173-1176.

    [33]LU Zhaojun.Explorations on the suctional shear strength of unsaturated soils[J].China Railway Science,1999,20(2):10-15.(in Chinese)

    [34]QI Guoqing,HUANG Runqiu.Study on genetic and mechanical analysis of debris flow based on unsaturated soils mechanics[J].The Chinese Journal of Geological Hazard and Control,2003,14(3):12-15.(in Chinese)

    [35]Wang Gonghui,Sassa Kyoji.Pore-pressure generation and movement of rainfall-induced landslides:effects of grain size and fine-particle content[J].Engineering Geology,2003,69:109-125.

    [36]YANG Chenglin,CHEN Ningsheng,LI Zhanlu.The formation mode and mechanism for debris flow induced by Wen Chuan Earthquake[J].Journal of Natural Disasters,2011,20(3):31-37.(in Chinese)

    [37]Institute of Mountain Hazards and Environment,Chinese Academy of Sciences.Debris Flow in China[M].Beijing:The Commercial Press,2000:60-69.(in Chinese)

    [38]XU Qiang.The Aug.13,2010 catastrophic debris flows in Sichuan Province:characteristics,genetic mechanism and suggestions[J].Journal of Engineering Geology,2010,18(5):596-608.(in Chinese)

This Article

ISSN:1004-4574

CN: 23-1324/X

Vol 23, No. 03, Pages 1-9

June 2014

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Abstract

  • 1 Research status of monitoring and early warning system for debris flows
  • 2 Motion mechanism of debris flow
  • 3 Constitution of the monitoring and early warning system
  • 4 Applications of monitoring and early warning system
  • 5 Conclusion
  • References