Sediment accumulation of Dianchi Lake determined by Cs-137 dating
文献类型：期刊论文
| 作者 | Zhang Yan1,2; Gao Xiang1; Zhong Zhenyu1; Chen Jie2; Peng Buzhuo1 |
| 刊名 | JOURNAL OF GEOGRAPHICAL SCIENCES
 |
| 出版日期 | 2009-04-01 |
| 卷号 | 19期号:2页码:225-238 |
| ISSN号 | 1009-637X |
| 关键词 | Cs-137 dating sediment accumulation rate sedimentation section Dianchi Lake |
| DOI | 10.1007/s11442-009-0225-7 |
| 通讯作者 | Zhang Yan(zhangynju@sina.com) |
| 英文摘要 | The water quality of Dianchi Lake declines quickly and the eutrophication is getting serious. To identify the internal pollution load of Dianchi Lake it is necessary to evaluate its sediment accumulation. Sedimentation rates of Dianchi Lake are determined by Cs-137 dating. However, Cs-137 vertical distribution in sediment cores of Dianchi Lake has special characteristics because Dianchi Lake is located on the southeast of the Qinghai-Tibet Plateau, the Kunming quasi-stationary front is over the borders of Yunnan and Guizhou where the specific precipitation is distributed. Besides 1954, 1963 and 1986 Cs-137 marks can be determined in sediment cores, a Cs-137 mark of 1976 representing the major period of Cs-137 released from China unclear test can be determined and used for an auxiliary dating mark. Meanwhile Dianchi Lake is divided into seven sections based on the water depth, basin topography, hydrological features and supplies of silt and the lakebed area of each section is calculated. The mean annual sedimentation rates for seven sections are 0.0810, 0.1352, 0.1457, 0.1333, 0.0904, 0.1267 and 0.1023 g/cm(2)a in 1963-2003, respectively. The gross sediment accumulation of the lake is 26.18x10(4) t/a in recent 17 years and 39.86x10(4) t/a in recent 50 years. |
| 收录类别 | SCI |
| WOS关键词 | SOIL-EROSION ; FALLOUT ; CESIUM-137 ; RATES ; TRACER ; PB-210 ; SR-90 ; CORES |
| WOS研究方向 | Physical Geography |
| WOS类目 | Geography, Physical |
| 语种 | 英语 |
| 出版者 | SCIENCE PRESS |
| WOS记录号 | WOS:000264923300009 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558749 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Zhang Yan |
| 作者单位 | 1.Nanjing Univ, Sch Geog & Oceanog Sci, Nanjing 210093, Peoples R China 2.CAS, State Key Lab Soil Sustainable Agr, Nanjing Inst Soil Sci, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang Yan,Gao Xiang,Zhong Zhenyu,et al. Sediment accumulation of Dianchi Lake determined by Cs-137 dating[J]. JOURNAL OF GEOGRAPHICAL SCIENCES,2009,19(2):225-238. |
| APA | Zhang Yan,Gao Xiang,Zhong Zhenyu,Chen Jie,&Peng Buzhuo.(2009).Sediment accumulation of Dianchi Lake determined by Cs-137 dating.JOURNAL OF GEOGRAPHICAL SCIENCES,19(2),225-238. |
| MLA | Zhang Yan,et al."Sediment accumulation of Dianchi Lake determined by Cs-137 dating".JOURNAL OF GEOGRAPHICAL SCIENCES 19.2(2009):225-238. |
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来源：南京土壤研究所
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