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Use of Cs-137 and Pb-210 radionuclides as tracers to investigate sediment sources in a small catchment of the Hilly Sichuan Basin, China
Language英语
Zhang Xinbao1; He Xiubing1; Wen Anbang1; Walling D.E.2; Feng Mingyi3; Zou Xiang1
2004
Source PublicationPROCEEDINGS OF THE NINTH INTERNATIONAL SYMPOSIUM ON RIVER SEDIMENTATION, VOLS 1-4
Author of SourceHu, C ; Tan, Y ; Zhou, Z ; Shao, X ; Liu, C
Pages2643-2648
meeting9th International Symposium on River Sedimentation
Conference DateOCT 18-21, 2004
Conference PlaceYichang
CountryPEOPLES R CHINA
Publication PlaceBEIJING
PublisherTSINGHUA UNIVERSITY PRESS
Contribution Rank1
AbstractDouble radionuclide tracers of Cs-137 and Pb-210 were used to investigate sediment sources in the Wujia Gully, a small catchment in the Hilly Sichuan Basin in 2002. Average Cs-137 and Pb-210 concentrations in the source soils of the steep forest slopes, gentle cultivated terraces and bare slopes were 7.15 Bq(.)kg(-1) 0.40 Bq(.)kg(-1) and 162.01 Bq(.)kg(-1) +/- 3.86 Bq(.)kg(-1), 4.01 Bq(.)kg(-1) +/- 0.31 Bq(.)kg(-1) and 70.96 Bq(.)kg(-1) +/- 2.65 Bq(.)kg(-1), and 0 and 15.12 Bq(.)kg(-1) +/- 1.22 Bq(.)kg(-1), respectively, while those concentrations in the recently deposited sediments in the reservoir were 3.06 Bq(.)kg(-1) +/- 0.23 Bq(.)kg(-1) and 72.66 Bq(.)kg(-1) +/- 1.61 Bq(.)kg(-1), respectively. By using the mixing model, the relative sediment contributions from steep forest slopes, gentle cultivated terraces and bare slopes (including channel banks) were estimated to be 18%, 46% and 36%, respectively. Cultivated terraces and bare slopes (including channel banks) were the first and the second important sediment sources in catchment. Specific sediment yield in the catchment was 642 t(.)km(-2.)a(-1) from the deposited sediment volume in the reservoir since 1956. Soil erosion rates for the forest slopes and cultivated terraces, which accounted for 2/3 and 1/3 of the drainage area in the catchment, were estimated to be 173 t(.)km(-2.)a(-1) and 886 t(.)km(-2.)a(-1), respectively.
Keywordsediment source relative contribution (CS)-C-137 Pb-210 Hilly Sichuan Basin
ISBN7-302-09684-8
Indexed ByCPCI
WOS IDWOS:000226799100385
Citation statistics
Document Type会议论文
Identifierhttp://ir.imde.ac.cn/handle/131551/33527
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.CAS, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China;
2.Department of Geography and Archaeology, Exeter University, Exeter EX 44RJ, UK;
3.China West Normal University, Nanchong 637002, 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
Zhang Xinbao,He Xiubing,Wen Anbang,et al. Use of Cs-137 and Pb-210 radionuclides as tracers to investigate sediment sources in a small catchment of the Hilly Sichuan Basin, China[C]//Hu, C, Tan, Y, Zhou, Z, Shao, X, Liu, C. BEIJING:TSINGHUA UNIVERSITY PRESS,2004:2643-2648.
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