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[1]LI Xuan,YANG Benyong,FAN Jianrong,et al.Assessment on the Hazard of Debris Flows in the Upper Min River Based on the Watershed Catchment-Unit[J].Research of Soil and Water Conservation,2015,22(06):335-339.

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Assessment on the Hazard of Debris Flows in the Upper Min River Based on the Watershed Catchment-Unit

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 22 Number of periods: 2015 06 Page number: 335-339 Column: Public date: 2015-12-28

Title:: Assessment on the Hazard of Debris Flows in the Upper Min River Based on the Watershed Catchment-Unit

Author(s):: LI Xuan^1,2, YANG Benyong³, FAN Jianrong¹, ZHANG Jianqiang¹, LI Leilei^1,2; 1. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences & Ministry of Water Resources, Chengdu 610041, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China;
3. Third Geographic Information Cartographic Institute, State Bureau of Surveying Mapping of Geoinformation, Chengdu 610100, China

Keywords:: debris flow; the upper Min River; catchment-unit; hazard assessment

CLC:: P642.23

DOI:: -

Abstract:: There are three conditions of the debris flow on formation including topography, geology and precipitation. Where there are formation conditions of debris flow, there is possible for the debris flow occurrence. We chose the upper Min River as study area, took the digital elevation model(DEM) as the basic terrain data, used the mean change point method and drainage density method combined with the remote sensing image, and got the distribution of drainage area. And we calculated topographic factors of each drainage area, such as lithology, the density of fracture, average slope gradient, and degree of watershed development, channel gradient and 24-hour rainfall of each valley. Using the principal component analysis, we identified the potential sites of debris flows in the upper Min River. According to the analysis result, the evaluation results can reflect the distribution of debris flow of the upper Min River, which can provide guidance and reference for disaster prevention in this area.

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