西藏地区小流域泥石流洪峰流量计算方法与改进
陈晓清; 杨东旭
刊名水土保持通报
2012-12
卷号32期号:6页码:1-6
关键词泥石流 洪峰流量 小流域
其他题名Modified Method for Peak Discharge Calculation of Debris Flows in Southwest Area of Tibet
通讯作者陈晓清
中文摘要在西藏地区泥石流野外调查中发现,泥石流形成区下限下延至流域中游、流通区沟道形态复杂、沟道交汇等现象明显。因此,基于全流域特征参数的雨洪法计算难以得到准确的泥石流设计参数。针对此类泥石流沟道,采用了子流域叠加雨洪法计算的方法。以西藏山南地区某泥石流沟为例,针对支沟面积>25%的沟道进行了计算和讨论。利用三角形概化泥石流流量过程线,计算了交汇后主沟泥石流的洪峰流量。比较了全流域雨洪法和划分子流域雨洪法的计算结果,认为子流域法能更准确地反映支沟泥石流在整个流域内的影响和作用,可为防治工程设计提供参考。
英文摘要Debris-flow valleys in Southeast Tibet were found distinct in their channel structure.The source area of debris flow usually extends to the middle reaches,with cross and confluence of the channels.The traditional method based on the full-valley parameters is inadequate to provide accurate parameters for engineering designs.We proposed a new method to calculate the peak discharge of debris flow.Based on field survey in Shannan Prefecture of Tibet,a traditional valley was measured.We calculated the hydrograph with the triangle model and concentration time of sub-basins with large areas(25% of full-valley area),and then obtained the converged hydrograph and corresponding peak discharge,which is amended by the concentration times of two sub-basins.Comparing the results of the full-valley method and the proposed new method,we concluded that the proposed method accurately captured the contribution of dynamic sub-basin discharges and is of greater applicability.
学科主题水文地理学
分类号P642.23
收录类别CSCD
资助信息国家重点基础科学(973)研究发展计划项目“中国西部特大山洪泥石流灾害形成机理与风险分析”(2011CB409900);国家自然科学基金项目(41072270)
语种中文
CSCD记录号CSCD:4746036
公开日期2012-12-11
内容类型期刊论文
源URL[http://192.168.143.20:8080/handle/131551/4415]  
专题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
陈晓清,杨东旭. 西藏地区小流域泥石流洪峰流量计算方法与改进[J]. 水土保持通报,2012,32(6):1-6.
APA 陈晓清,&杨东旭.(2012).西藏地区小流域泥石流洪峰流量计算方法与改进.水土保持通报,32(6),1-6.
MLA 陈晓清,et al."西藏地区小流域泥石流洪峰流量计算方法与改进".水土保持通报 32.6(2012):1-6.
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