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[1]LIU Hong-jiang,HAN Yong-shun,JIANG Yu-hong,et al.Risk Assessment of Debris Flow in Dongchuan Area, Kunming,Yunnan Province[J].Research of Soil and Water Conservation,2007,14(06):241-244.

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Risk Assessment of Debris Flow in Dongchuan Area, Kunming,Yunnan Province

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 14 Number of periods: 2007年06期 Page number: 241-244 Column: Public date: 1900-01-01

Title:: Risk Assessment of Debris Flow in Dongchuan Area, Kunming,Yunnan Province

Author(s):: LIU Hong-jiang^1,2, HAN Yong-shun^2,3, JIANG Yu-hong², ZHANG Ji²; 1. Statistics and Information School, Yunnan University of Finance and Economics, Kunming 650223 China;
2. Institute of Mountain Hazards and Environment, CAS, Chengdu 610041, China;
3. Institute of Geo-spatial Information Science, Hu’nan University of Science&Technology, Xiangtan, Hu’nan 411201, China

Keywords:: debris flow; risk evaluation; model; GIS; Dongchuan District

CLC:: P642.23

DOI:: -

Abstract:: Debris flow risk assessment can be divided into five levels/steps, i.e.the field survey, the background conditions analysis, the risk assessment, the evaluation of the situation of the hazard and the advise of the mitigation way.Ten factors, which represent the energy, the mass quantity and the trigging conditions of the debris flow, were put into the weight model and the square model to estimate the debris flow risk of nature backgrounds for the studying area.It has shown that the result of the weight model is better than that of the square model.Four factors, which represent the social and economy backgrounds, are used to evaluate the economic levels of the studying area.Then, we put them together to get the comprehensive risk assessment at last.The result has 4 levels.The most dangerous zone is about 133.7 km² and about 79.0% of the total debris flow gullies of the studying area are located in this zone; the serious dangerous zone is about 580.6 km² and it has 19.8% of the debris flow gullies; the middle (light) dangerous zone is about 723.9 km² and about 1.2% of the debris flow gullies are located in this zone; the safety area is about 119.0 km² and it has no debris flow gully.This result fits the field survey data fairly well, and it shows that the method used in this paper is reliable.Advice of mitigation way is also provided.

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Last Update: 1900-01-01