Study on the characteristics and formation mechanism of the typical post-fire debris flow in Lushan area of Xichang City: A case study of 3# branch on the left bank of Xiangshuigou
TIE Yongbo, XU Ruge, LIU Hong, WANG Jiazhu, BA Renji, XIANG Anping, YANG Jian, OUYANG Yuan, ZHANG Yu, WANG Hong
Chengdu Geological Survey Center, China Geological Survey, Chengdu 610081, China
Abstract：On March 30, 2020, a forest fire broke out in Liangshan area of Xichang City in Sichuan Province. After the fire, the ash and burnt soil easily developed into debris flow in case of heavy rainfall, which brought potential geological hazard risks to the ecological environment of Lushan and safety of local people's lives and properties in Qionghai and Lushan areas. Taking 3# branch on the left bank of Xiangshuigou in Anha Town as an example, the authors conducted field investigation, UAV aerial photography, geophysical exploration, field and indoor experiments to study the fluid characteristics, dynamic parameters and genetic mechanism of the post-fire debris flow on May 1, 2020. The features of movement, provenance scale and deduced precipitation were also systematically analyzed. This achievement could provide some reference for the study of the development trend of the post-fire debris flow and the mitigation of disasters in this area.
铁永波, 徐如阁, 刘洪, 王家柱, 巴仁基, 向安平, 杨剑, 欧阳渊, 张玙, 王宏. 西昌市泸山地区典型火后泥石流特征与成因机制研究——以响水沟左岸3#支沟为例[J]. 中国地质调查, 2020, 7(3): 82-88.
TIE Yongbo, XU Ruge, LIU Hong, WANG Jiazhu, BA Renji, XIANG Anping, YANG Jian, OUYANG Yuan, ZHANG Yu, WANG Hong. Study on the characteristics and formation mechanism of the typical post-fire debris flow in Lushan area of Xichang City: A case study of 3# branch on the left bank of Xiangshuigou. , 2020, 7(3): 82-88.
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2020, Vol. 7 
