Check dam sediments: an important indicator of the effects of environmental changes on soil erosion in the Loess Plateau in China
Wang, YF (Wang, Yafeng)[ 2,1 ]; Chen, LD (Chen, Liding)[ 1 ]; Fu, BJ (Fu, Bojie)[ 1 ]; Lu, YH (Lu, Yihe)[ 1 ]
2014-07-01
发表期刊ENVIRONMENTAL MONITORING AND ASSESSMENT
卷号186期号:7页码:4275-4287
文章类型期刊论文
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.

关键词Check Dam Sediment 137cs(137-cesium) Soil Erosion Environmental Change
DOI10.1007/s10661-014-3697-6
收录类别SCIE ; EI
语种英语
引用统计
被引频次:19[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/9809
专题黄土与第四纪地质国家重点实验室(2010~)
通讯作者Fu, BJ (Fu, Bojie)[ 1 ]
作者单位1.State Key Laboratory of Urban and Regional Ecology,Research Center for Eco-Environmental Sciences, ChineseAcademy of Sciences,P. O. Box 2871, Beijing 100085, People’s Republic of China;
2.Stay Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment Chinese Academy of Sciences,Xi’an 710075, People’s Republic of China
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GB/T 7714
Wang, YF ,Chen, LD ,Fu, BJ ,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, YF ,Chen, LD ,Fu, BJ ,&Lu, YH .(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, YF ,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.
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