Effects of dam interception on the spatial distribution of sediment granularities in Heihe River

doi:10.18307/2019.0505

	Effects of dam interception on the spatial distribution of sediment granularities in Heihe River
	Wang, Yu 1,2; Lian, Yuntao 1; Feng, Qi 2; Wang, Zhijun 1; Zhao, Weijun 3; Liu, Juanjuan 1; Lu, Shiguo 1; Zhang, Xinyu 1
刊名	Hupo Kexue/Journal of Lake Sciences
	2019-09-06
卷号	31 期号:5 页码:1459-1467
关键词	Drainage Grain size and shape Higher order statistics Hydrodynamics Particle size Particle size analysis Reservoirs (water) Sedimentology Sediments Size distribution Spatial distribution Water Cascade reservoirs Grain size Grain size characteristics Grain size distribution Heihe river Hydrodynamic conditions River sediments Sedimentary environment
ISSN号	10035427
DOI	10.18307/2019.0505
英文摘要	River sediments respond sensitively to the basin environmental changes and particle size parameters can reflect the material sources and hydrodynamic environment. This article takes the Heihe River as a case to explore the response of river sediment grain size to the basin environmental changes. River sediment samples were collected from 22 sections along the mainstream of the Heihe River. Then, sieving and pipette methods were applied to measure the particle size. Spatial variations of grain size parameters and their responses to the anthropogenic environmental changes of the basin through river damming were analyzed. The results showed that the grain size of the upper and middle reaches of Heihe River was significantly different under the influence of the construction of cascade reservoirs. The grain size of reservoir sediment decreased more obviously in the river section within cascade reservoirs than in the original natural reach, and the sediments are characterized by well-sorted, with acute kurtosis and positive skew or very positive skew. In addition, the sediment grain size shows the characteristics of layered sedimentary at different depositional heights in the reservoirs. The downstream river of the Dam was suffering from strong erosion, and the grain size of bed sediments is coarse and poorly sorted, and the grain size distributions are more positively skewed with sharp kurtosis. The backwater area of the reservoir is restricted by backwater and drainage water, and the sediment particle size is between the original natural river and the downstream river of the dam, with middle sorted sediments, positively skewed grain size distribution and acute kurtosis. Sedimentary environment analysis reveals that the sediments grain size characteristics of upstream tributary are more influenced by material sources than hydrodynamic conditions, while the grain size characteristics of main stream sediments are mainly controlled by hydrodynamic conditions. The results are consistent with the normal pattern of sediment grain sizes distribution in rivers, and also reflect the impact of environmental changes on river sediment grain size composition. © 2019 by Journal of Lake Sciences.
语种	中文
出版者	Science Press
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114765]
专题	能源与动力工程学院新能源学院
作者单位	1.School of Energy and Power Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Key Laboratory of Ecohydrology of Inland River Basin, Northwest Institute Eco-environment and Resources, Chinese Academy of Sciences, Lanzhou; 730000, China; 3.Academy of Water Resources Conservation Forests in Qilian Mountains of Gansu Province, Zhangye; 734000, China
推荐引用方式 GB/T 7714	Wang, Yu,Lian, Yuntao,Feng, Qi,et al. Effects of dam interception on the spatial distribution of sediment granularities in Heihe River[J]. Hupo Kexue/Journal of Lake Sciences,2019,31(5):1459-1467.
APA	Wang, Yu.,Lian, Yuntao.,Feng, Qi.,Wang, Zhijun.,Zhao, Weijun.,...&Zhang, Xinyu.(2019).Effects of dam interception on the spatial distribution of sediment granularities in Heihe River.Hupo Kexue/Journal of Lake Sciences,31(5),1459-1467.
MLA	Wang, Yu,et al."Effects of dam interception on the spatial distribution of sediment granularities in Heihe River".Hupo Kexue/Journal of Lake Sciences 31.5(2019):1459-1467.