干旱区生态环境知识资源中心(Arid): 风水两相侵蚀条件下流域泥沙粒径分布分形维数特征以黄河上游内蒙古段西柳沟为例

Arid

	风水两相侵蚀条件下流域泥沙粒径分布分形维数特征以黄河上游内蒙古段西柳沟为例
其他题名	Fractal Dimension of Sediment Particle Size Distribution in Catchment with Coupled Wind-Water Erosion Processes-A Case Study at Xiliugou Catchment in Upper Reaches of Yellow River in Inner Mongolia
	阳辉; 师长兴; 姚海芳
来源期刊	水土保持通报
ISSN	1000-288X
出版年	2016
卷号	36 期号:4 页码:84-89
中文摘要	[目的]研究在风水两相侵蚀条件下流域泥沙粒径分布分形维数特征,为风水两相侵蚀产沙和高含沙水流侵蚀产沙的治理等问题的研究提供理论和试验依据。[方法]选取位于黄河上游内蒙古段的西柳沟流域为例,采集沉积物表层样,利用激光粒度仪对43个样点的泥沙粒度组成进行分析,采用分形理论,结合方差分析以及K均值聚类法进行分析和研究。[结果](1)不同沉积环境下泥沙粒径分布分形维数不同,以水力侵蚀为主的丘陵沟壑区分形维数平均值最大,为2.48;以风力侵蚀为主的沙漠区分形维数平均值最小,为1.95。(2)对于西柳沟流域,泥沙颗粒组成中粒径在0.05mm以下的含量越高,粒径越离散,分维值越高;粒径在0.05~1mm之间的颗粒含量越高,分形维数越低;粒径在1mm以上的颗粒含量与分形维数关系不明显。相对来说,粉粒含量对于分形维数的影响大于黏粒含量。[结论]地貌条件主要影响的是河床样的泥沙粒径组成,产沙层土样的颗粒组成不受地貌条件的影响,河滩样的泥沙粒径组成受地貌条件和沉积环境的双重影响。
英文摘要	[Objective]The fractal dimension of particle size distribution in a basin with coupled wind-water erosion processes was studied to provide theoretical and experimental basis for the research and control of coupled wind-water erosion and hyper-concentrated flow sediment.[Methods]Xiliugou catchment,which is located in the upper stream of the Yellow River in Inner Mongolia Autonomous Region,was selected as the study area.Total 43Surface sediment samples at different locations were collected in the catchment.The sediment grain size composition was measured by a laser particle size analyzer.Based on the fractal theory and using the ANVOA and K-means cluster methods,the fractal dimensions of particle size distribution in the Xiliugou catchment were obtained and its influencing factors were analyzed.[Results](1)The fractal dimension of particle size distribution varied under different depositional environment.The highest fractal dimension(2.48)was found in the hilly-gullies region where water erosion prevail,and the lowest(1.87)in the desert region,where wind erosion is much active.(2)The fractal dimension increased with the increase of particles content lower than 0.05mm,but decreased with the increase of particles content within 0.05~1mm. The relation between the fractal dimension and the content of particles larger than 1mm was not significant. The influence of silt content on the fractal dimension was greater than that of clay content.[Conclusion] The sediments on river bed in different geomorphic units had significant discrepant particle size composition and the particle size composition of sediments on berms changed evidently both in different geomorphic units along the river and in different depositional environment within the floodplains.The particle size composition of sediment sources,the regolith or loess,did not show obviously variations between different geomorphic units.
中文关键词	西柳沟 ; 风水两相 ; 泥沙 ; 分形维数
英文关键词	Xiliugou catchment wind-water erosion sediments fractal dimension
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOGRAPHY
WOS研究方向	Geography
CSCD记录号	CSCD:5784432
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234949
作者单位	中国科学院地理科学与资源研究所, 中国科学院陆地水循环及地表过程重点实验室, 北京 100101, 中国
推荐引用方式 GB/T 7714	阳辉,师长兴,姚海芳. 风水两相侵蚀条件下流域泥沙粒径分布分形维数特征以黄河上游内蒙古段西柳沟为例[J]. 中国科学院地理科学与资源研究所,2016,36(4):84-89.
APA	阳辉,师长兴,&姚海芳.(2016).风水两相侵蚀条件下流域泥沙粒径分布分形维数特征以黄河上游内蒙古段西柳沟为例.水土保持通报,36(4),84-89.
MLA	阳辉,et al."风水两相侵蚀条件下流域泥沙粒径分布分形维数特征以黄河上游内蒙古段西柳沟为例".水土保持通报 36.4(2016):84-89.