Sediment source analysis using the fingerprinting method in a small catchment of the Loess Plateau, China

CORC > 水土保持研究所 > 中国科学院水利部水土保持研究所 > 水保所科研产出--SCI > 2016--SCI

	Sediment source analysis using the fingerprinting method in a small catchment of the Loess Plateau, China
	Fangxin Chen 1,2,3; Fengbao Zhang 1; Nufang Fang 1,2; Zhihua Shi 1,2,3
刊名	JOURNAL OF SOILS AND SEDIMENTS
	2016
通讯作者邮箱	fnf@ms.iswc.ac.cn
卷号	5 期号:16 页码:1655-1669
关键词	Check dam Fallow Fingerprinting Reforestation Sediment Soil erosion
通讯作者	Nufang Fang
英文摘要	Purpose This paper aims to use the composite fingerprinting method to reconstruct the environmental history after the Grain-for-Green Project and to provide effective sediment management and soil erosion-control strategies. Materials and methods This study used a composite fingerprinting method based on 45 geochemical properties and a mixing model to investigate sediment core changes in the sediment source in an agricultural catchment with little native vegetation. The samples consisted of 77 source samples (i.e., gully, grassland, forest, cropland, and fallow land) and five sediment cores. Genetic algorithm (GA) optimization has been recently used to find the best optimum source contribution to sediments. Results and discussion The results demonstrate that gully is the main sediment source in this catchment, constituting 34.7 %, followed by cropland (28.2 %), forest (21.5 %), grassland (12.7 %), and fallow land (2.9 %). However, the relative contribution of each source type was variable in all five sediment cores. The sediment that derived from grassland was relatively stable in the five cores. The relative contribution of forest was higher in the downstream portion of the check dam and lower in the upstream portion and gradually increased in the direction of the runoff pathway. As the forest matured, the sediment that derived from the forest gradually decreased. Changes in the hydro-ecological environment would lead to the leaf litter and understory being poorly developed and the soil being bare in the forest, making it more vulnerable to erosion. Conclusions Reforestation and fallow are the key ecological strategies for reducing soil erosion. However, at the beginning of the Grain-for-Green Project, the young forest contributed 21.5 % of the sediment, indicating that natural fallow may be a better-designed sediment management and soil erosion-control strategy.
语种	英语
WOS记录号	WOS:000376265500021
内容类型	期刊论文
源URL	[http://ir.iswc.ac.cn/handle/361005/7794]
专题	水土保持研究所_水保所科研产出--SCI_2016--SCI
作者单位	1.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A & F University, Yangling 712100, People’s Republic of China 2.Institute of Soil and Water Conservation of Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, People’s Republic of China 3.College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, People’s Republic of China
推荐引用方式 GB/T 7714	Fangxin Chen,Fengbao Zhang,Nufang Fang,et al. Sediment source analysis using the fingerprinting method in a small catchment of the Loess Plateau, China[J]. JOURNAL OF SOILS AND SEDIMENTS,2016,5(16):1655-1669.
APA	Fangxin Chen,Fengbao Zhang,Nufang Fang,&Zhihua Shi.(2016).Sediment source analysis using the fingerprinting method in a small catchment of the Loess Plateau, China.JOURNAL OF SOILS AND SEDIMENTS,5(16),1655-1669.
MLA	Fangxin Chen,et al."Sediment source analysis using the fingerprinting method in a small catchment of the Loess Plateau, China".JOURNAL OF SOILS AND SEDIMENTS 5.16(2016):1655-1669.