| 泥石流堵塞主河条件 |
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| 引用本文： | 党超,程尊兰,刘晶晶.泥石流堵塞主河条件[J].山地学报,2009,27(5). |
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| 作者姓名： | 党超 程尊兰 刘晶晶 |
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| 作者单位： | 1. 中国科学院地表过程与动力学重点试验室,四川,成都,610041;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;中国科学院研究生院,北京,100049
2. 中国科学院地表过程与动力学重点试验室,四川,成都,610041;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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| 基金项目： | 国家自然科学基金，交通部西部交通建设科技项目 |
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| 摘 要： | 分析了泥石流堵河的主要影响因素,包括泥石流与主河流量比,泥石流与主河交汇角,主河宽度,泥石流体的抗冲强度和主河底床坡度.通过对这些主要因素的分析和对比,将这5个主要因素简化为4个无量纲量.针对这些无量纲参数进行了一系列的泥石流堵塞主河试验.对比本次研究和其他文献关于泥石流堵河试验的变量和结果,可以得出无量纲化的泥石流堵塞主河的临界条件.实验结果表明,泥石流堵河的临界值C≥0.87,而且当流量比小于1时难以形成堵河现象.用该堵塞主河的条件能正确判断许多原型泥石流堵塞主河事件.
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| 关 键 词： | 泥石流 主河 堵塞 堵河判别指数 |
Critical Conditions for Dam-forming due to Injunction of Debris Flow into Mainstream |
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| DANG Chao,CHENG Zunlan,LIU Jingjing.Critical Conditions for Dam-forming due to Injunction of Debris Flow into Mainstream[J].Journal of Mountain Research,2009,27(5). |
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| Authors: | DANG Chao CHENG Zunlan LIU Jingjing |
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| Institution: | 1.Key Laboratory of Mountain Hazards and Surface Process;Chinese Academy of Sciences;Chengdu 610041;China;2.Institute of Mountain Hazards and Environment;3. Graduate University of Chinese Academy of Sciences;Beijing 100049;China |
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| Abstract: | The events of dam-forming due to injunction of debris flow into mainstream often occur in mountainous drainage basin.The critical conditions for dam-forming,mainly including discharge ratio between tributary and mainstream,the confluent angles,width of mainstream,resistance of debris flow against erosion and the slope of mainstream,are discussed herein,and the 5 elements could be simplified by 4 dimensionless parameters throng theoretical analysis.A dimensionless critical index for dam-forming is given on t... |
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| Keywords: | debris flow mainstream blockage critical index for dam-forming |
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