汶川地震极震区泥石流动力特征及参数研究——以安县高川乡为例
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摘要
2008年汶川8.0级地震发生以来,极震区泥石流爆发频率有增无减且规模越来越大,破坏性越来越强,严重威胁灾区人民生命财产安全。对比采取现场勘查、遥感图像分析、历史资料对比分析等方法,分析了极震区泥石流动力特征受地形、地层、物源等因素的影响,特别是泥石流爆发过程中深侵蚀和溃决对泥石流动力特征的影响。针对四川安县高川乡流域泥石流沟的调查和分析,建立泥石流流量-冲刷模型,分析了常规地区泥石流峰值流量与极震区泥石流峰值流量差别,推导出极震区峰值流量及冲刷深度定量计算公式。通过实例分析,理论与实际具有较好的一致性,对极震区泥石流动力参数计算具有较好适用性和有效性。
Since M8. 0 Wenchuan earthquake in 2008,the outbreak frequency of debris flows in the meizoseismal area is increasing both in number and scale,imperiling life and property safeties of people in the disaster area seriously. We use field exploration,remote sensing image analysis,historical data analysis and other methods to analyze the influence of debris flow dynamic characteristics affected by terrain,stratum,source,etc in meizoseismal area,especially the affection of debris flow in the process of landslide outbreak and erosion. According to the investigation and analysis of the Gaochuan valley debris flow gully,we establish a flow-flushing model to analyze the difference of landslide dynamic parameters in the meizoseismal area and normal region,and deduce the quantitative calculation formula of peak flow and scour depth in meizoseismal area. Through the case analysis,we found the theory has a good consistency with practice,which has a good applicability and effectiveness in calculating dynamic parameters of debris flow in the meizoseismal area.
引文
[1]殷跃平.四川汶川地震触发地质灾害研究[J].工程地质学报,2008,16(4):433-444.
    [2]许强.汶川大地震诱发地质灾害主要类型与特征研究[J].地质灾害与环境保护,2009,20(2):86-93.
    [3]崔鹏,韦方强,何思明,等.512汶川地震诱发的山地灾害及减灾措施[J].山地学报,2008,27(3):280-282.
    [4]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(13):341-349.
    [5]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.
    [6]雷发洪,胡凯衡,胡云华,等.汶川地震灾区震后泥石流激发雨量研究[J].灾害学,2014,29(2):199-203.
    [7]梁京涛,唐川,王军,等.强震区小流域泥石流发育特征研究—以四川省绵竹市罗家沟泥石流为例[J].灾害学,2013,8(3):100-104.
    [8]刘洋,唐川,李为乐,等.四川省都江堰市龙池地区群发性泥石流物源敏感性分析[J].灾害学,2013,8(2):107-113.
    [9]胡凯衡,崔鹏,游勇等.汶川灾区泥石流峰值流量的非线性雨洪法修正[J].四川大学学报,2010,42(5):52-57.
    [10]朱兴华,崔鹏,周公旦,等.稀性泥石流冲刷规律的试验研究[J].水利学报,2012,43(supp.2):85-91.
    [11]李忠生.国内外地震滑坡灾害研究综述[J].灾害学,2003,18(4):64-70.
    [12]冯文凯,黄润秋,许强.地震波效应与山体斜坡震裂机理深入分析[J].西北地震学报,2011,33(1):20-25.
    [13]康志成,李焯芬.中国泥石流研究[M].北京:科学出版社,2004:79.
    [14]潘华利,欧国强,柳金峰.泥石流沟道侵蚀初探[J].灾害学,2009,24(1):40-43.
    [15]Grosta G,Imposimato S,Roddeman D.Numerical modeling of entrainment in rock and debris-avalanches[J].Enginerring Geology,2009,109(2):135-145.
    [16]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.
    [17]梁至勇,匡尚富,王兆印,等.高含沙洪水冲刷规律的探讨[J].泥沙研究,1999(12):68-73.

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