都江堰龙池镇三神公泥石流灾害特征
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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 Longchi Town of Dujiangyan City after May 12,2008 Wenchuan,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 sediment 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.
Debris flow hazards caused by rainstorms in Longchi Town of Dujiangyan City after May 12,2008 Wenchuan,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 sediment 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.
引文
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[9]唐川,朱静,张翔瑞.GIS支持下的地震诱发滑坡危险区预测研究[J].地震研究,2001,24(1):73-81.TANG Chuan,ZHU Jing,ZHANG Xiangrui.GIS based earthquake triggered landslide hazard prediction[J].Journal of Seismological Research,2001,24(1):73-81.(in Chinese)
[2]许强.四川省8.13特大泥石流灾害特点、成因与启示[J].工程地质学报,2010,18(5):596-608.XU Qiang.The 13 Angust 2010 catastrophic debris flows in sichuan Province:characteristics,genetic mechanism and suggestions[J].Journal ofEngineering Geology,2010,18(5):596-608.(in Chinese)
[3]唐川.汶川地震区暴雨滑坡泥石流活动趋势预测[J].山地学报,2010,28(3):341-349.TANG Chuan.Activity tendency prediction of rainfall induced landslides and debris flows in the Wenchuan earthquake areas[J].Journal of moun-tain science,2010,28(3):341-349.(in Chinese)
[4]崔鹏,庄建琦,陈兴长,等.汶川地震区震后泥石流活动特征与防治对策[J].四川大学学报:工程科学版,2010,42(5):10-19.CUI Peng,ZHUANG Jianqi,CHEN Xingchang,et al.Characteristics and Countermeasures of Debris Flow in Wenchuan Area After the Earth-quake[J].Journal of Sichuan University:Engineering Science Edition,2010,42(5):10-19.(in Chinese)
[5]马煜,余斌,吴雨夫,等.四川都江堰龙池“8.13”八一沟大型泥石流灾害研究[J].四川大学学报:工程科学版,2011,43(增刊1):92-98.MA Yu,YU Bin,WU Yufu,et al.Research on the Disaster of Debris Flow of Bayi Gully,Longchi,Dujiangyan,Sichuan on August 13,2010[J].Journal of Sichuan University:Engineering Science Edition,2011,43(S1):92-98.(in Chinese)
[6]余斌.根据泥石流沉积物计算泥石流容重的方法研究[J].沉积学报,2008,26(5):789-796.YU Bin.Research on the calculating density by the deposit of debris flows[J].Acta Sedmentologica Sinica,2008,26(5):789-796.(in Chi-nese)
[7]余斌.不同容重的泥石流淤积厚度计算方法研究[J].防灾减灾工程学报,2010,30(2):207-211.YU Bin.Study on the method for deposition depth calculation of debris flow with different densities[J].Journal of Disaster Prevention and Mitiga-tion Engineering,2010,30(2):207-211(in Chinese)
[8]余斌.粘性泥石流的平均运动速度研究[J].地球科学进展,2008,23(5):524-532.YU Bin.Study on the mean velocity of viscous debris flows[J].Advances in Earth Science,2008,23(5):524-532.(in Chinese)
[9]唐川,朱静,张翔瑞.GIS支持下的地震诱发滑坡危险区预测研究[J].地震研究,2001,24(1):73-81.TANG Chuan,ZHU Jing,ZHANG Xiangrui.GIS based earthquake triggered landslide hazard prediction[J].Journal of Seismological Research,2001,24(1):73-81.(in Chinese)
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