龙池镇冷浸沟泥石流调查及危险度评价
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摘要
5.12汶川地震和2010年8.13、8.19暴雨使龙池镇龙溪河两岸山体暴发了大规模群发性泥石流。为分析此次泥石流暴发原因,以冷浸沟泥石流为例,通过对冷浸沟的地形、水源、物源条件的调查分析,计算了该泥石流流速、峰值流量、固体冲出量等动力学参数,并评价了冷浸沟的危险度,得出泥石流的危险度为0.52,属于中度危险。
5.12 Wenchuan Earthquake and the storm on 13 and 19 August,2010 resulted in the large-scale outbreak of debris flows in the mountains along the Longxi River in Longchi Town.In order to analyze the causes of the debris flows,a typical debris flow of the Lengjin Gully is studied as an example.Through the investigation and analysis of the ditch topography,water sources,matter sources,the dynamic parameters of debris flow are calculated,such as debris flow velocity,peak capacity,sediment flush-out of the debris flow.And then evaluate the hazard degree of Lengjin Gully is evaluated.It is concluded that the hazard degree of the debris flow is 0.52,which belongs to the moderate risk of debris flow.
5.12 Wenchuan Earthquake and the storm on 13 and 19 August,2010 resulted in the large-scale outbreak of debris flows in the mountains along the Longxi River in Longchi Town.In order to analyze the causes of the debris flows,a typical debris flow of the Lengjin Gully is studied as an example.Through the investigation and analysis of the ditch topography,water sources,matter sources,the dynamic parameters of debris flow are calculated,such as debris flow velocity,peak capacity,sediment flush-out of the debris flow.And then evaluate the hazard degree of Lengjin Gully is evaluated.It is concluded that the hazard degree of the debris flow is 0.52,which belongs to the moderate risk of debris flow.
引文
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[8]Tang C,Zhu J,Li W L.Rainfall-triggered DebrisFlows following the Wenchuan Earthquake[J].BullEng Geol Environ,2009,68(2):187-194.
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[10]四川省国土资源厅,中铁西南科学院,中科院成都山地灾害研究所,等.泥石流灾害防治工程勘查规范(DZ/T0220-2006)[S].北京:中国标准出版社,2006.
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[2]谢洪,钟敦伦,矫震,等.2008年汶川地震重灾区的泥石流[J].山地学报,2009,27(4):501-509.
[3]徐俊名,谭万沛.1976年松潘平武地震泥石流[A].中国科学院成都地理研究所.泥石流(3)[C].重庆:科学技术文献出版社重庆分社,1986:67-75.
[4]钟敦伦.试论地震在泥石流活动中的作用[A].中国科学院成都地理研究所.泥石流论文集[C].重庆:科技文献出版社重庆分社,1981:30-35.
[5]中国地震局.汶川8.0级地震烈度分布图[EB/OL].http://news.sina.com.cn/c/2008-09-02/013616312546.shtml,2008-09-02.
[6]Lin C W,Shieh C L,Yuan B D,et al.Impact of Chi-Chi Earth Quake on the Occurrence of Landslidesand Debris Flows:Example from the ChenyulanRiver Watershed,Nantou,Taiwan[J].EngineeringGeology,2003,71(1-2):49-61.
[7]Chen H,Hawkins A B.Relationship between Earth-quake Disturbance,Tropical Rainstorms and DebrisMovement:an Overview from Taiwan[J].Bull EngGeol Environ,2009,68(2):161-186.
[8]Tang C,Zhu J,Li W L.Rainfall-triggered DebrisFlows following the Wenchuan Earthquake[J].BullEng Geol Environ,2009,68(2):187-194.
[9]Coe J A,Glancy P A,Whitney J W.Volumetric A-nalysis and Hydrologic Characterization of a ModernDebris Flow near Yucca Mountain Nevada[J].Geo-morphology,1997,20(1-2):11-28.
[10]四川省国土资源厅,中铁西南科学院,中科院成都山地灾害研究所,等.泥石流灾害防治工程勘查规范(DZ/T0220-2006)[S].北京:中国标准出版社,2006.
[11]刘希林,唐川.泥石流危险性评价[M].北京:科学出版社,1995.
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