137Cs budget during the period of 1960s in a small drainage basin on the Loess Plateau of China
文献类型：期刊论文
| 作者 | X. He
|
| 刊名 | Journal of Environmental Radioactivity
 |
| 出版日期 | 2006 |
| 卷号 | 86期号:1页码:78-91 |
| 关键词 | 137Cs budget |
| 通讯作者 | X. Zhang |
| 合作状况 | 国际 |
| 英文摘要 | A sediment profile with a thickness of 28.12 m in a failed reservoir in a small catchment of the Yuntaishan Gully in the Loess Plateau of China consisted of 44 flood couplets deposited during the period from 1960 to 1970 with total volume of 2.36 × 106 m3. Specific sediment yields for a flood event varied from 300 t km−2 to 14,400 t km−2 and annual sediment yields varied from 2500 t km−2 in 1966 to 40,000 t km−2 in 1964 with a mean value of 12,700 t km−2 a−1 for the period. Average annual 137Cs concentrations of the sediments increased from 0.92 Bq kg−1 in 1960 to 4.82 Bq kg−1 in 1963, then decreased to 1.53 Bq kg−1 in 1970. The total 137Cs activity in the reservoir sediments was 9.22 × 109 Bq, which accounted for 31.9% of the total 137Cs fallout precipitation of 2.89 × 1010 Bq within the catchment during the period. The proportion of the 137Cs loss from the catchment to the 137Cs fallout precipitation within the catchment in a year varied between 8.01% and 66.8%, and it was 20.9% for the peak 137Cs deposition year of 1963 and 52.0% in 1964. By analysis of the 137Cs budget in the catchment for the 137Cs peak precipitation period from 1962 to 1964, the 137Cs surface enrichment coefficient Γ should be much less than 0.23. And for calculation of soil losses on the cultivated land in the inter-gully area by using the Mass Balance Model II, the value of Γ should be 0.05–0.1. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2010-11-24 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/2604]  |
| 专题 | 成都山地灾害与环境研究所_成都山地所知识仓储（2009年以前） 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 |
| 推荐引用方式 GB/T 7714 | X. He. 137Cs budget during the period of 1960s in a small drainage basin on the Loess Plateau of China[J]. Journal of Environmental Radioactivity,2006,86(1):78-91. |
| APA | X. He.(2006).137Cs budget during the period of 1960s in a small drainage basin on the Loess Plateau of China.Journal of Environmental Radioactivity,86(1),78-91. |
| MLA | X. He."137Cs budget during the period of 1960s in a small drainage basin on the Loess Plateau of China".Journal of Environmental Radioactivity 86.1(2006):78-91. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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