IMHE OpenIR  > 山地表生过程与生态调控重点实验室
Using Cs-137 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
Ju Li1,2; Wen An-bang1; Long Yi1; Yan Dong-chun1; Guo Jin1,2
Corresponding AuthorWen An-bang
2013
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
Volume10Issue:3Pages:428-436
SubtypeArticle
AbstractSoil 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 Cs-137 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 Cs-137 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 Cs-137 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.
KeywordPond Deposition Soil Erosion Rate Sediment Budget Cs-137 Sediment Delivery Ratio Three Gorges Reservoir Region
WOS HeadingsScience & Technology ; Life Sciences & Biomedicine
DOI10.1007/s11629-013-2585-9
URL查看原文
WOS Subject ExtendedEnvironmental Sciences & Ecology
Indexed BySCI
WOS KeywordACCUMULATION RATES ; FALLOUT CESIUM-137 ; DEPOSITION RATES ; EROSION ; DELIVERY ; PB-210 ; LAKE ; MANAGEMENT ; PROFILES ; PATTERNS
Language英语
Quartile4区
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WOS SubjectEnvironmental Sciences
WOS IDWOS:000319418700010
Funding OrganizationNational Key Technology RD Program(2011BAD31B03) ; Action Plan for West Development of Chinese Academy of Sciences(KZCX2-XB3-09) ; National Natural Science Foundation of China(41201275 ; Western Light-Western Doctor of CAS ; 41101259 ; 41001163)
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Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/8322
Collection山地表生过程与生态调控重点实验室
科技与合作处
Affiliation1.Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Ju Li,Wen An-bang,Long Yi,et al. Using Cs-137 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 Ju Li,Wen An-bang,Long Yi,Yan Dong-chun,&Guo Jin.(2013).Using Cs-137 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 Ju Li,et al."Using Cs-137 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.
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