蒋家沟流域非泥石流活动期的输沙特征

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部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

	蒋家沟流域非泥石流活动期的输沙特征
	郭晓军; 崔鹏; 苏凤环
刊名	长江科学院院报
	2013
卷号	30 期号:5 页码:27-33
关键词	推移质悬移质高斯分布分形蒋家沟
其他题名	Sediment Transport Characteristics in Non-debris Flow Period in Jiangjia Gully
通讯作者	郭晓军
合作状况	国内
中文摘要	实测2008-2009年间蒋家沟非泥石流时期推移质和悬移质的总量，分析非泥石流时期蒋家沟的输沙特征，结果表明：非泥石流活动期推移质含量极大，年输沙量达3．6万t，相当于一次中等规模泥石流的固体物质总量；泥石流对推移质和悬移质含量影响很大，泥石流之后，河道内悬移质和推移质含量呈衰减趋势，其中悬移质呈负幂指数衰减Y=Y0exp（-bx），推移质衰减速度大于悬移质；推移质粒径范围雨季和旱季差别较大，悬移质则相对一致，悬移质和推移质粒径分布均满足对数高斯分布Y=aexp（-（x-b）^2/c^2）；悬移质具有良好的分形特征，能得到其分维值范围，并确定悬移质分形的无标度区的界限，即划分床沙质和冲泻质的临界粒径为16μm，大于和小于该粒径的颗粒组成均具有较好的分形特征。
英文摘要	The total amount of bed load and suspended load in non-debris flow period from 2008 to 2009 in Jianglia Gully was field measured, and the sediment transport characteristic was analyzed. Both the bed load and suspended load contents vary greatly between rainy season and dry season; the yearly bed load amount in non-debris flow peri- od is up to 36,000 ton, as much as the total solid material amount of a medium-scale debris flow. The debris flow has a significant influence on the amounts of both bed load and suspended load. After the debris flow, the suspen-ded load content decreases following the exponential curve y = y0exp（ - bx）, while the bed load contents decreases more steeply. The particle size of bed load varies in rainy season and dry season, while that of suspended load is relatively consistent. Both the particle size distributions follow the Gaussian distribution y = aexp（-（x-b）^2/c^2）; thesuspended load show fractal characteristic. Fractal dimension values are calculated, and the critical scaleless range is identified as 16μm, which divides the bed material load and wash load, and the grain material of both of them show fractal characteristic evidently.
学科主题	灾害学
分类号	P642.2
收录类别	CSCD
资助信息	国家科技支撑计划课题(2012BAC06B02);中科院重点部署项目(KZZD-EW-05-01-02)
CSCD记录号	CSCD:4820371
公开日期	2013-12-21
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/6672]
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	郭晓军,崔鹏,苏凤环. 蒋家沟流域非泥石流活动期的输沙特征[J]. 长江科学院院报,2013,30(5):27-33.
APA	郭晓军,崔鹏,&苏凤环.(2013).蒋家沟流域非泥石流活动期的输沙特征.长江科学院院报,30(5),27-33.
MLA	郭晓军,et al."蒋家沟流域非泥石流活动期的输沙特征".长江科学院院报 30.5(2013):27-33.