Did streamflow or suspended sediment concentration changes reduce sediment load in the middle reaches of the Yellow River?

doi:10.1016/j.jhydro1.2017.01.002

	Did streamflow or suspended sediment concentration changes reduce sediment load in the middle reaches of the Yellow River?
	Zhang, Jianjun 1,2,3; Zhang, Xioping 1; Li, Rui 1; Chen, Lili 1; Lin, Pengfei 1,3
刊名	JOURNAL OF HYDROLOGY
	2017-03-01
卷号	546 页码:357-369
关键词	Ecological restoration Sediment yield Suspended sediment concentration Streamflow Loess Plateau
ISSN号	0022-1694
DOI	10.1016/j.jhydro1.2017.01.002
通讯作者	Zhang, Xioping(zhangxp@ms.iswc.ac.cn)
英文摘要	The continuous ecological restoration of the Loess Plateau, which aims to reduce the sediment entering into the Yellow River, is known throughout the world for two strategies: the integrated soil conservation project that began in the 1970s, and the "Grain for Green" project that began in the 1990s. However, the topic of whether the muddy water in the middle Yellow River run clearer remains debatable, and, in fact, response to the topic is reasonably well documented in regard to hydrological changes in the sediment source area. Six sub-catchments nested in the Beiluo River basin - one of the major sediment sources for the Yellow River - were selected, with data series ranging from 1957 to 2009. The Mann-Kendall and Pettitt tests were used for trend detection. A simple method was developed based on the distribution of suspended sediment concentration (SSC) versus water discharge. Using this method, we evaluated the quantities of sediment yield reduction attributed to streamflow and SSC changes due to the two strategies. The results showed that annual sediment yield in 5 out of 6 stations significantly decreased, with rates varying from -4 to -217 t center dot km(-2)center dot yr(-1). Significant decreases in daily and event streamflow and suspended sediment concentration were identified, especially at a high SSC (top 1-5%). During the integrated soil conservation period, the sediment yield was reduced mainly by decreases in high flow and high SSC conditions. In contrast, during the "Grain for Green" period, sediment yield was reduced due to decreases in streamflow and SSC at all magnitudes. It was concluded that rainfall-sediment load dynamics have changed in the context of ecological restoration. Changes in both streamflow and the SSC-water discharge relationship induced the sediment yield reduction over time; in other words, the streamflow in the middle reaches of Yellow River became clearer during periods of ecological restoration. Moreover, the increased annual sediment yield at the Zhangcunyi station exposed a risk of increased erosion in areas where forests had been well preserved. (c) 2017 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[41230852] ; National Natural Science Foundation of China[41440012] ; National Natural Science Foundation of China[41101265] ; Special-Funds of Scientific Research Programs of State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau[A314021403-C2]
WOS关键词	LOESS PLATEAU ; CLIMATE VARIABILITY ; VEGETATION CHANGES ; SOIL-EROSION ; CHECK-DAM ; CHINA ; BASIN ; YIELD ; TRENDS ; DEFORESTATION
WOS研究方向	Engineering ; Geology ; Water Resources
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000395607700030
资助机构	National Natural Science Foundation of China ; Special-Funds of Scientific Research Programs of State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/64703]
专题	中国科学院地理科学与资源研究所
通讯作者	Zhang, Xioping
作者单位	1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, Beijing 100085, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Jianjun,Zhang, Xioping,Li, Rui,et al. Did streamflow or suspended sediment concentration changes reduce sediment load in the middle reaches of the Yellow River?[J]. JOURNAL OF HYDROLOGY,2017,546:357-369.
APA	Zhang, Jianjun,Zhang, Xioping,Li, Rui,Chen, Lili,&Lin, Pengfei.(2017).Did streamflow or suspended sediment concentration changes reduce sediment load in the middle reaches of the Yellow River?.JOURNAL OF HYDROLOGY,546,357-369.
MLA	Zhang, Jianjun,et al."Did streamflow or suspended sediment concentration changes reduce sediment load in the middle reaches of the Yellow River?".JOURNAL OF HYDROLOGY 546(2017):357-369.