摘要
受2008年"5.12"地震影响,四川都江堰地震灾区的龙池镇暴发了泥石流,造成了较大的经济损失。三神公泥石流沟位于龙池镇,"5.12"汶川地震产生的大量崩滑体为其提供了充分的物源,在暴雨条件下形成了泥石流。三神公泥石流具有流通区较短、流量较大、发生较隐蔽的特点。以现场调查资料为基础,分析了三神公泥石流的形成背景和成灾条件,计算了泥石流密度、屈服应力、流量、冲出总量等静动力学参数。对泥石流的起动和堆积特征进行了讨论,并且提出相应的防治措施。研究结果可为强震区泥石流灾害的防治提供参考。
Debris flow hazards caused by rainstorms in I^ngchi Town of Dujiangyan City after May 12, 2008 Wen- chuan, Sichuan earthquake and brought about a large quantity of economic loss. Sanshengong debris flow gully is located at Longchi Town. A lot of materials from collapses and landslides produced by the Wenchuan earthquake provided abundant material sources for debris flow. Sanshengong debris flow has features including short circulating area, hidden and relatively numerous discharges. Based on site survey, the formation background and conditions were analyzed, the static and dynamic parameters such as bulk density, yield stress, discharge, transported sedi- ment scale were calculated, the initiation and accumulation process of this debris flow event were discussed, and corresponding prevention and control measures were put forward. The results from the study may give a reference to prevention and control of debris flow in macroseismic area.
出处
《自然灾害学报》
CSCD
北大核心
2012年第6期136-141,共6页
Journal of Natural Disasters
基金
国家自然科学基金资助项目(41140030)
关键词
泥石流
暴雨
地震
防治
debris flow
rainstorm
earthquake
prevention prevention and control
