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Pb-210(ex) depth distribution in soil and calibration models for assessment of soil erosion rates from Pb-210(ex) measurements
Zhang, XB; Walling, DE; Feng, MY; Wen, AB
Corresponding AuthorZhang, XB
2003-04-01
Source PublicationCHINESE SCIENCE BULLETIN
ISSN1001-6538
Volume48Issue:8Pages:813-818
SubtypeArticle
AbstractThree soil cores collected from China and UK show the Pb-210(ex) and Cs-137 depth distribution on uncultivated and cultivated land. Depth distributions of the two nuclides are very similar. Those nuclide concentrations are higher in the top horizon and decrease exponentially with depth on uncultivated land while the concentrations are almost uniform throughout the plough layer as a result of mixing associated with cultivation on cultivated land. Pb-210(ex) reference 2 inventory in the Loess Plateau is 573 mBq . cm(-2), a little higher than 520.0 mBq . cm(-2) in UK. Distribution of artificial fallout Cs-137, produced during the nuclear testing period of the late 1950s and 1960s, is in an unsteady state. In contrast, distribution of natural fallout Pb-210(ex) is in a steady state under constant conditions of land environment and erosion processes for a long term, e.g. > 100 years. Therefore, mass balances of Cs-137 and Pb-210(ex) in soil are different. According to its processes of continues deposition from the atmosphere, nature decay and losses with soil losses, Pb-210(ex) steady state mass balance models for cultivated land as well as for uncultivated land are developed to estimate soil erosion rates in this paper. Besides, the proportion of freshly deposited Pb-210(ex) fallout removed by erosion on cultivated land can also be calculated from Pb-210(ex) depth distribution at a reference site of uneroded permanent grass land.
KeywordPb-210(Ex) Steady State Soil Erosion
WOS HeadingsScience & Technology
DOI10.1360/02wd0460
WOS Subject ExtendedScience & Technology - Other Topics
Indexed BySCI
WOS KeywordFALLOUT CS-137 ; CESIUM-137
Language英语
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000183995500021
Citation statistics
Cited Times:33[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/10593
Collection成都山地所知识仓储(2009年以前)
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, Chengdu Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
2.CAS, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China
3.Univ Exeter, Dept Geog & Archaeol, Exeter EX4 4RJ, Devon, England
Recommended Citation
GB/T 7714
Zhang, XB,Walling, DE,Feng, MY,et al. Pb-210(ex) depth distribution in soil and calibration models for assessment of soil erosion rates from Pb-210(ex) measurements[J]. CHINESE SCIENCE BULLETIN,2003,48(8):813-818.
APA Zhang, XB,Walling, DE,Feng, MY,&Wen, AB.(2003).Pb-210(ex) depth distribution in soil and calibration models for assessment of soil erosion rates from Pb-210(ex) measurements.CHINESE SCIENCE BULLETIN,48(8),813-818.
MLA Zhang, XB,et al."Pb-210(ex) depth distribution in soil and calibration models for assessment of soil erosion rates from Pb-210(ex) measurements".CHINESE SCIENCE BULLETIN 48.8(2003):813-818.
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