Pb-210(ex) depth distribution in soil and calibration models for assessment of soil erosion rates from Pb-210(ex) measurements
文献类型：期刊论文
| 作者 | Zhang, XB; Walling, DE; Feng, MY; Wen, AB |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 2003-04 |
| 卷号 | 48期号:8页码:813-818 |
| 关键词 | Pb-210(ex) steady state soil erosion |
| DOI | 10.1360/02wd0460 |
| 文献子类 | Article |
| 英文摘要 | Three 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. |
| 学科主题 | Science & Technology - Other Topics |
| WOS关键词 | FALLOUT CS-137 ; CESIUM-137 |
| WOS研究方向 | Multidisciplinary Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000183995500021 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.ieecas.cn/handle/361006/11983]  |
| 专题 | 黄土与第四纪地质国家重点实验室（1985-2004） |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：地球环境研究所
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