Risk assessment of debris flow disaster: a case study of Wudu District in the south of Gansu Province, China

SHU Heping1 QI Shi1 NING Na2 MA Jinzhu1 ZHANG Peng3

(1.Key Laboratory of Western China's Environment Systems of the Ministry of Education, College of Earth and Environmental Sciences, Lanzhou University, Lanzhou 73000, China 730000)
(2.Gansu Institute of Land Resources Planning and Research, Lanzhou 73000, China 730000)
(3.School of Civil and Construction, Three Gorges University, Yichang, China 443000)

【Abstract】Taking Wudu District in the south of Gansu Province as research object, and selecting 25 villages and towns in the district as assessment unit, the regional risk assessment was carried out by using regional hazard and vulnerability as basic assessment indices. The regional hazard was integrated through historical disaster data and field investigation data. At the same time, information method was adopted and 250 m × 250 m basic grid was selected as assessment unit, and then the hazard was obtained. Taking the exposure, the sensitivity and the recovery ability of hazard-affected body into account, with the help of DEA model and C-D function, the vulnerability values of villages and towns in Wudu District were calculated, and then the vulnerability subregion of villages and towns in research region was obtained. Hazard and vulnerability were coupled, and the regional risk coefficient was introduced, and then the risk assessment model was established, based on the risk rank and the risk zoning map of Wudu district which were obtained by using GIS technology. Meanwhile, some suggestions were proposed for disaster prevention and mitigation. The results show that the extremely high risk areas in Wudu district were mainly distributed in the Chengguan Town, Dongjiang Town, Majie Town, Bolin Village, Anhua Town and most parts of Hanwang Town.

【Keywords】 debris flow; hazard; GIS; vulnerability; risk assessment;

【DOI】

【Funds】 National Science and Technology Pillar Program (Grant No. 2011BAK12B05) National Science and Technology Pillar Program(Grant No.2011BAK12B05)

Download this article

    References

    [2]ZHONG Dunlun, XIE Hong. Debris flow, and human economic activities[J]. Resources and Environment in the Yangtze Basin, 1999, 8(3): 327–332 (in Chinese).

    [3]TANG Chuan, ZHANGJun, SHIWanyun, et al. Loss evaluation of urban debris flow hazard using high spatial resolution satellite imagery[J]. ScientisGeographice Sinica, 2006, 26(3): 358–363 (in Chinese).

    [5]LIU Xilin, ZHAOYuan, LIXiuzhen, et al. Disaster risk assessment of typical debris flows in Dechang County of Sichuan[J]. Journal of Natural Disasters, 2006, 15(1): 11–16 (in Chinese).

    [10]TAN Bingyan. The severity of debris flow gully quantification comprehensive evaluation[J]. Bulletin of Soil and Water Conservation, 1986, 6(l): 51–57 (in Chinese).

    [11]LIU Xilin. Research of debris flow risk decision[J]. Journal of Catastrophology, 1988, 3(3): 10–15 (in Chinese).

    [12]LIU Xilin. Regional risk assessment on debris flow[J]. Journal of Nature Disasters, 2000, 9(1): 54–61.

    [13]LIU Li, WANGJianzhong, WANG Shige. Risk analysis and regional ization for the insuranece of debris-flow disaster in Sichuan Province[J]. Journal of Nature Disasters, 2003, 12(1): 103–108 (in Chinese).

    [14]TIE Yongbo. The Methodology and Framework Study of Urban Debris Flow Risk Aeeseement[D]. Chengdu: Chengdu University of Technology, 2009 (in Chinese).

    [15]SHANG Zhihai, LIUXilin. Preliminary risk evaluation study on life loss due to debris flow disaster[J]. Journal of Safety and Environment, 2010, 10(4): 184–188 (in Chinese).

    [16]ZHANG Xion, PEI Xiangjun, PEI Zuan, et al. Study on discharge calculation method of debris flows in meizoseismal areas[J]. Journal of Natural Disasters, 2014, 23(6): 227–233 (in Chinese).

    [17]SHU Heping, MAJinzhu, ZHANG Peng, et al. Risk assessment of detris flow hazards in different rain fall frequences[J]. Journal of Lanzhou Uniuersity: Natural Sciences, 2014, 50(5): 653–658 (in Chinese).

    [18]SHU Heping, SUNShuang, MAJinzhu, et al. Risk assessment of single debris flow gully in the south Gansu Province, China[J]. Mountain Research, 2016, 34(3): 337–345 (in Chinese).

    [19]LIU Jinfeng, JIANGCheng, OUGuoqiang, et al. Susceptibility evaluation of debris flow in the Wudu District, LongnanCity, Gansu Province[J]. The Chinese Journal of Geological Hazard and Control, 2010, 21(4): 8–13 (in Chinese).

    [20]NING Na, MAJinzhu, ZHANGPeng, et al. Debris flow hazard assessment for the Bailongjiang River, Southern Gansu[J]. Resources Science, 2013, 35(4): 892–899 (in Chinese).

    [21]CHEN Liang, MENGGaotou, ZHANGWenjie, et al. Application of information model on geological hazards investigatin and zoning of counties and cities: as an example of Xianju County, Zhejiang Province]J]. Hydrogeology and Engingeering Geology, 2003, (5): 49–52 (in Chinese).

    [23]LIU Yi, HUANGJianyi, MA Li. The assessment of regional vulnerability to natural disasters in China based on DEA model[J]. Geog raphicalResearch, 2010, 20(7): 1 153–1 162 (in Chinese).

    [24]LV Jun, LIMingze, HOUJundong, et al. Assessment of the vulnerability and prevention efficient of geological disasters in China based on supper-efficiency DEA model[J]. Safety and Environmental Engineering, 2013, 20(3): 35–40 (in Chinese).

    [25]LI Chunhua, LIYu, HUAijun, et al. An economic vulnerability assessment of floods using the IIM-TSDEA model in China[J]. China Population, Resources and Environment, 2014, 24(2): 169–176 (in Chinese).

    [26]GONG Shuming. Applied Statistics[M]. Beijing: Beijing Jiaotong University Press, 2007 (in Chinese).

    [27]GU Chunjie, SUNShuang, MAJinzhu, et al. Research on debris flow disaster vulnerability based on the production function[J]. Mountain Research, 2015, 33(3): 303–310 (in Chinese).

    [28]GU Chunjie, SUNShuang, MA Jinzhu. Debris flow vulnerability assessment based on DEA model and production function[J]. Journal of Lanzhou University: Natural Sciences, 2014, 50(5): 751–756 (in Chinese).

    [29]WEI Quanling. Evaluate the Relative Effectiveness of DEA Method: New Field of Operations Research[M]. Beijing: China Renmin University Press, 1988 (in Chinese).

    [30]LIU Xilin, MO Duowen. Debris Flow Risk Assessment[M]. Sichuan: Sichuan Science and Technology Press, 2003, 47–82 (in Chinese).

    [31]LIU Xilin, CHENYijuan. Application of debris flow risk aonation: an example of west Sichuan[J]. Geographical Science, 2010, 30(4): 558–565 (in Chinese).

This Article

ISSN:1004-4574

CN: 23-1324/X

Vol 25, No. 06, Pages 34-41

December 2016

Downloads:2

Share
Article Outline

Abstract

  • 1Geological setting
  • 2 Risk assessment method of debris flow
  • 3 Assessment results
  • 4 Disaster prevention and mitigation recommendation
  • 5 Conclusions
  • References