Hazard assessment of debris flow in severely-afflicted area by Wenchuan Earthquake: A case study along DujiangyanWenchuan Highway
HAN Yong-Shun, LI Long-Wei-Shu-Ying-Pan, KONG E-Beng, LI Zhi-Jiang, HUANG Feng
1.School of Architecture and Urban Planning, Hunan University of Science and Technology, 411201, Xiangtan, Hunan；2.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, 610041, Chengdu；3.Research Center for Environmental Protection and Safety of Transportation, China Academy of Transportation Sciences, 100029, Beijing：China
Abstract：Hazard assessment of debris flows along highway is an important technological foundation for preventing & mitigating traffic geo-hazards and for reconstructing & planning destroyed traffic infrastructure by earthquake. In this paper, 28 debris flow gullies along DujiangyanWenchuan Highway (abbreviated to DuWen Highway) were taken as research objects. Corresponding geographical information and thematic hazards data were collected, and they were processed and analyzed through remote sensing, GIS technology. Assessment factors were selected and respective weights were determined by means of grey correlation analysis method. Meanwhile, a hazard assessment model of debris flow was established and applied to assess the hazard of 28 debris flow gullies along DuWen Highway. The findings show that: a) most of 28 debris flow gullies belong to high & severely high risk zones with 15 high risk gullies and 7 severely high risk gullies, that is,78.57% of total gullies; b)The highest risk gullies are Ergou, Niujuangou & Mozigou , next came Gaodianzigou, Manianpingou & Yiwanshuigou gullies; c) The multi-factor assessment method based on gray-correlation can fairly well select assessment factors, determine corresponding weights and calculate the value of hazard degree of each debris flow gully. The results can provide basis & reference for preventing & mitigating debris flows, reconstructing & planning stricken areas and selecting & designing traffic lines.
韩用顺1，李龙伟1，朱颖彦2，孔亚平3，李志强3，黄鹏1. 汶川地震灾区泥石流危险性评估——以都江堰—汶川公路为例[J]. 中国水土保持科学, 2012, 10(1): 6-11.
HAN Yong-Shun, LI Long-Wei-Shu-Ying-Pan, KONG E-Beng, LI Zhi-Jiang, HUANG Feng. Hazard assessment of debris flow in severely-afflicted area by Wenchuan Earthquake: A case study along DujiangyanWenchuan Highway. SSWCC, 2012, 10(1): 6-11.
2012, Vol. 10 
