水利学报Issue(z2)：147-154,8.
四川彭州龙门山镇8·18泥石流灾害特征与成灾模式分析
Characteristics and Causes of 8·18 Debris Flow Hazards at the Longmenshan Town,Pengzhou,Sichuan
摘要
Abstract
The catastrophic debris flows on Aug.18, 2012 resulted in huge property loss in Longmenshan Town,Pengzhou,China. Debris flows occurred in 60 sites and 20 gully debris flows distributed along Bai⁃shui River,intensively destroyed the buildings at the right bank. Debris flows were featured with less than 2% of fine soil content,the density of 1.74~1.91g/m 3,the peak discharge of 360~1 274m3/s as well as the process of rainstorm-landslide-debris flow-dammed lake-outburst flood. The discharge of debris flow remark⁃ably amplified in small gullies,equaling to 5.0~29 times that before Wenchuan Earthquake. High-velocity and large discharge debris flows made direct hazards by intensively impacting, scouring and burying con⁃structions as well as burying and destructing highway base. Outburst flood and river channel rise induced by debris flows enlarged the stricken areas and losses. The irrational location of constructions and the de⁃struction of debris flow control constructions leaded to huge property losses. Encountering the active debris flow hazards in the future, it was strongly suggested for mitigation that strengthened the prediction of de⁃bris flows change trend, assessed risk of the dangerous debris flow gullies, relocated reconstruction based on debris flow risk assessment, improved the standards of control construction, reconstructed destructed highway at Xiaojiaping and improved the capabilities of prevention and mitigation.关键词
泥石流/成因/特征/成灾模式/龙门山镇Key words
debris flows/characteristics/causes/hazards modes/Longmenshan Town分类
天文与地球科学引用本文复制引用
葛永刚,宋国虎,郭朝旭,孔应德..四川彭州龙门山镇8·18泥石流灾害特征与成灾模式分析[J].水利学报,2012,(z2):147-154,8.基金项目
国家重点基础研究发展计划（973计划）课题（2011CB409902）；国家科技支撑计划课题 （）
