Using 137Cs Tracing Methods to Estimate Soil Redistribution Rates and to Construct a Sediment Budget for a Small Agricultural Catchment in the Three Gorges Reservoir Region, China

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2013 > Vol10 No.3

	Using 137Cs Tracing Methods to Estimate Soil Redistribution Rates and to Construct a Sediment Budget for a Small Agricultural Catchment in the Three Gorges Reservoir Region, China
	WEN An-bang; LONG Yi; YAN Dong-chun
刊名	Journal of Mountain Science
	2013-06
卷号	10 期号:3 页码:428-436
关键词	Pond deposition Soil erosion rate Sediment budget 137Cs Sediment delivery ratio Three Gorges Reservoir Region
通讯作者	WEN An-bang
英文摘要	Soil erosion and associated off-site sedimentation are threatening the sustainable use of the Three Gorges Dam. To initiate management intervention to reduce sediment yields, there is an increasing need for reliable information on soil erosion in the Three Gorges Reservoir Region (TGRR). The purpose of this study is to use ¹³⁷Cs tracing methods to construct a sediment budget for a small agricultural catchment in the TGRR. Cores were taken from a pond and from paddy fields, for ¹³⁷Cs measurements. The results show that the average sedimentation rate in the pond since 1963 is 1.50 g cm^-2 yr^-1 and the corresponding amount of sediment deposited is 1,553 t. The surface erosion rate for the sloping cultivated lands and the sedimentation rate in the paddy fields were estimated to be 3,770 t km^-2 yr^-1 and 2,600 t km^-2 yr^-1, respectively. Based on the estimated erosion and deposition rates, and the area of each unit, the post 1970 sediment budget for the catchment has been constructed. A sediment delivery ratio of 0.5 has been estimated for the past 42 years. The data indicate that the sloping cultivated lands are the primary sediment source areas, and that the paddy fields are deposition zones. The typical land use pattern (with the upper parts characterized by sloping cultivated land and the lower parts by paddy fields) plays an important role in reducing sediment yield from agricultural catchments in the TGRR. A ¹³⁷Cs profile for the sediment deposited in a pond is shown to provide an effective means of estimating the land surface erosion rate in the upstream catchment.
收录类别	SCI
语种	英语
公开日期	2013-06-14
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/5395]
专题	成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2013_Vol10 No.3 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室科技与合作处
推荐引用方式 GB/T 7714	WEN An-bang,LONG Yi,YAN Dong-chun. Using 137Cs Tracing Methods to Estimate Soil Redistribution Rates and to Construct a Sediment Budget for a Small Agricultural Catchment in the Three Gorges Reservoir Region, China[J]. Journal of Mountain Science,2013,10(3):428-436.
APA	WEN An-bang,LONG Yi,&YAN Dong-chun.(2013).Using 137Cs Tracing Methods to Estimate Soil Redistribution Rates and to Construct a Sediment Budget for a Small Agricultural Catchment in the Three Gorges Reservoir Region, China.Journal of Mountain Science,10(3),428-436.
MLA	WEN An-bang,et al."Using 137Cs Tracing Methods to Estimate Soil Redistribution Rates and to Construct a Sediment Budget for a Small Agricultural Catchment in the Three Gorges Reservoir Region, China".Journal of Mountain Science 10.3(2013):428-436.