| 基于137Cs的土壤沉积速率的定量模型 |
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| 引用本文： | 崔琚琰,杨浩,杜明远,王轶虹.基于137Cs的土壤沉积速率的定量模型[J].水土保持通报,2009,29(1):99-102. |
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| 作者姓名： | 崔琚琰 杨浩 杜明远 王轶虹 |
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| 作者单位： | 南京师范大学地理科学学院,江苏南京,210046
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| 基金项目： | 国家自然科学基金，高等学校博士学科点专项科研基金 |
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| 摘 要： | 在假设137Cs在耕层中得到充分混合而变得均一的基础上,根据质量平衡原理建立了一个根据农业耕作土壤剖面中137Cs的沉积量和土壤沉积量之间关系的定量模型.在建立模型的过程中,充分考虑了137Cs的衰变常数,年沉降分量,耕层厚度和采样年份等因素.模型的模拟结果表明,137Cs的沉积量与年平均土壤沉积量之间的关系是一种复杂的曲线关系.
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| 关 键 词： | 土壤沉积速率 定量模型 |
| 收稿时间： | 2008/6/19 0:00:00 |
| 修稿时间： | 2008/9/11 0:00:00 |
Quantitative Model of Soil Deposition Rate Constructed by Using 137Cs |
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| CUI Ju-yan,YANG Hao,DU Ming-yuan and WANG Yi-hong.Quantitative Model of Soil Deposition Rate Constructed by Using 137Cs[J].Bulletin of Soil and Water Conservation,2009,29(1):99-102. |
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| Authors: | CUI Ju-yan YANG Hao DU Ming-yuan and WANG Yi-hong |
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| Institution: | School of Geography, Nanjing Normal University, Nanjing, Jiangsu 210046, China;School of Geography, Nanjing Normal University, Nanjing, Jiangsu 210046, China;School of Geography, Nanjing Normal University, Nanjing, Jiangsu 210046, China;School of Geography, Nanjing Normal University, Nanjing, Jiangsu 210046, China |
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| Abstract: | According to mass balance model and the assumption that before 137Cs in plow layer was mixed for a uniform distribution,the surface of cultivated soil would form a surface enrichment layer,a quantitative model was developed to relate the amount of 137Cs enrichment from the cultivated soil profile to soil deposition rate.During the construction of the model,the depth of surface enrichment layer,the 137Cs depth distribution pattern in enrichment layer,the 137Cs decay constant,the 137Cs input fraction,the depth of plow layer,and sampling year were considered.Results from the model construction prove that the relationship between the rate of soil deposition and 137Cs enrichment is neither linear nor logarithmic. |
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| Keywords: | 137Cs |
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