中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
藏东南部泥石流堵河试验研究

文献类型:期刊论文

作者刘晶晶; 宫怡文; 程尊兰
刊名地学前缘
出版日期2007
卷号14期号:6页码:181-187
关键词泥石流 堵塞坝 河床特征 模型试验
其他题名Experiments of debris flow damming in Southeast Tibe
合作状况其它
中文摘要:通过模型试验对泥石流入汇主河后堵塞坝形成过程以及堵塞坝体渍决后主河河床形态特征进行了 研究。实验历时3个月,共13组试验。在支主沟交汇角为9O。的情况下,通过改变支沟泥石流容重、支主沟的 流量比和动量比,建立了泥石流堵河的判别公式,当r>1 001.16时容易发生堵河现象,并对培龙沟两次泥石流堵河事件进行了判定;定义了主河的束窄率s与主河流速变异系数F ,并发现了主河的束窄率与支主沟动量比之间存在线性关系;主河稳定后的平均宽度与流速变异系数之间存在幂的关系。该实验能够较好地模拟泥石流堵塞坝形成的过程,结果比较合理,并为泥石流灾害的防治提供了相应的理论基础。
英文摘要In this paper,the formations of jammed dam by debris flow’S injection and the influences on mainstream’S riverbed by subsequent outburst of the dam have been discussed based on a mode1 test.The ex— periments lasted 3 months,together with 13 groups of tests in al1.As the junctional angle is equal to 90,the critical index of jammed dam are established through the adjustments of density of debris flow,discharge ratio and momentum ratio between branch gully and main river;the jammed dams are easily formed when r> 1 001.16;the two events of damming in Peilong gully(1984,1985)have been discrimi nated.The shrinkage ratio of main river S and coefficient of velocity variation have been defined,and the results indicate that there iS a 1inear relationship between the momentum ratio and the shrinkage ratio of main river,and also an ex— ponential relationship between the ultimate average width of main river and the coefficient of velocity variation. This mode1 test can simulate the process of damming of debris flow,and the results that offer theoretic basis for the mitigation of debris flow are comparatively reasonable.
资助信息国家自然科学基金资助项目(40771024);交通部西部交通建设科技项目(2OO631879284)
语种中文
公开日期2010-11-11
源URL[http://ir.imde.ac.cn/handle/131551/2504]  
专题成都山地灾害与环境研究所_成都山地所知识仓储(2009年以前)
成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
推荐引用方式
GB/T 7714
刘晶晶,宫怡文,程尊兰. 藏东南部泥石流堵河试验研究[J]. 地学前缘,2007,14(6):181-187.
APA 刘晶晶,宫怡文,&程尊兰.(2007).藏东南部泥石流堵河试验研究.地学前缘,14(6),181-187.
MLA 刘晶晶,et al."藏东南部泥石流堵河试验研究".地学前缘 14.6(2007):181-187.

入库方式: OAI收割

来源:成都山地灾害与环境研究所

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