汶川地震灾区震后泥石流激发雨量研究
Excitation Rainfall of Debris Flows in the Stricken Area of Wenchuan Earthquake
查看参考文献25篇
文摘
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降雨作为泥石流的触发因素,常用于泥石流的预警预报,一个地区泥石流发生与否与前期有效累积降雨量和激发雨量相关密切。在对汶川地震灾区已发泥石流灾害的18个泥石流案例的1 h 激发雨量与流域面积、沟谷长度、松散物质储量、岩石类型、地震动峰值加速度、土地利用类型以及泥石流沟的坡度等影响泥石流活跃性的因子进行主成分分析基础上,选取了6个主成分对泥石流1 h 雨量激发系数进行拟合,得出了1 h 激发雨量的计算方法。并讨论了该方法在地震灾区的适用性,可为地震灾区泥石流灾害的预警预报提供参考。 |
其他语种文摘
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There is high relationship between rainfall intensity and trend of debris flow occurrence,so rainfall intensity is usually used for debris flow warning. By using Matlab principle component analysis on driving factors of debris flows are carried out based on 18 debris flows events,which contain watershed area,channel length,volume of loosely material,rock types,soil types,seismic intensity. Finally,6 principle components are selected to generate a multiple liner regression model of the critical rainfall of debris flows. Feasibility of the model is discussed. It can provide reference for warning of debris flow in the stricken area. |
来源
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灾害学
,2014,29(2):199-203 【扩展库】
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关键词
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地震灾区
;
泥石流
;
激发雨量
;
汶川地震
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地址
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1.
中国科学院·水利部成都山地灾害与环境研究所, 中国科学院山地灾害与地表过程重点实验室, 四川, 成都, 610041
2.
中国科学院·水利部成都山地灾害与环境研究所, 四川, 成都, 610041
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语种
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中文 |
文献类型
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研究性论文 |
ISSN
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1000-811X |
学科
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地质学;灾害及其防治 |
基金
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国家973计划
;
中国科学院“百人计划”项目
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文献收藏号
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CSCD:5125869
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