Check dam sediments: an important indicator of the effects of environmental changes on soil erosion in the Loess Plateau in China

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Check dam sediments: an important indicator of the effects of environmental changes on soil erosion in the Loess Plateau in China
	Wang, Yafeng ; Chen, Liding ; Fu, Bojie ; Lu, Yihe
刊名	ENVIRONMENTAL MONITORING AND ASSESSMENT
	2014
卷号	186 期号:7 页码:4275-4287
关键词	Check dam Sediment Cs-137((137)-Cesium) Soil erosion Environmental change
ISSN号	0167-6369
中文摘要	Check dam sediments document the process of soil erosion for a watershed. The main objectives of this research are as follows: first, to determine whether the sediments trapped in check dams can provide useful information about local erosion and the environment, and second, to obtain the extent to which they can be stratigraphically interpreted and correlated to the land use history of an area controlled by check dams. Particle size and the concentration of Cs-137 in sediments are the indicators used to study the effects of environmental changes on soil erosion in the Loess Plateau, China. A total of 216 soil samples were collected from four sediment profile cores at the Yangjuangou watershed check dam constructed in 1955 and fully silted with sediments by 1965. The results indicated that Cs-137 dating and sediment particle size can characterize the sediment deposition process. Silt makes up more than 50 % of the sediment; both the clay and silt sediment fractions decrease gradually in the upstream direction. The sediment profiles are characterized by three depositional layers. These layers suggest changes in the land use. The top layer showed tillage disturbance, with moderate sediments and new soil mixed from 0 to 20 cm. A transition stage from wetlands (characterized by vegetation such as bulrush) to cropland is inferred from sediments at depths of 20-85 cm. Below 85 cm, sedimentary layering is obvious and there is no tillage disturbance. At the downstream site, A0, the average rate of sediment deposition from 1958 to 1963 was approximately 6,125.4 t year(-1) km(-2). Because of their high time resolution, check dam sediments indicate the effects of environmental changes on soil erosion, and they can provide a multiyear record of the soil erosion evolution at the local scale in the middle reaches of the Yellow River.
WOS记录号	WOS:000337030000025
公开日期	2015-03-23
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/9121]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Wang, Yafeng,Chen, Liding,Fu, Bojie,et al. Check dam sediments: an important indicator of the effects of environmental changes on soil erosion in the Loess Plateau in China[J]. ENVIRONMENTAL MONITORING AND ASSESSMENT,2014,186(7):4275-4287.
APA	Wang, Yafeng,Chen, Liding,Fu, Bojie,&Lu, Yihe.(2014).Check dam sediments: an important indicator of the effects of environmental changes on soil erosion in the Loess Plateau in China.ENVIRONMENTAL MONITORING AND ASSESSMENT,186(7),4275-4287.
MLA	Wang, Yafeng,et al."Check dam sediments: an important indicator of the effects of environmental changes on soil erosion in the Loess Plateau in China".ENVIRONMENTAL MONITORING AND ASSESSMENT 186.7(2014):4275-4287.