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| 基于分形方法确定合肥大兴地区土壤中Cd元素的异常下限 | |
| 引用本文： | 汪伟,张颖慧,袁峰,李湘凌,周涛发.基于分形方法确定合肥大兴地区土壤中Cd元素的异常下限[J].环境科学与管理,2009,34(5):27-30. |
| 作者姓名： | 汪伟 张颖慧 袁峰 李湘凌 周涛发 |
| 作者单位： | 1. 合肥市环境保护科学研究所,安徽,合肥,230041 2. 合肥市斯康环境科技咨询有限公司,安徽,合肥,230041 3. 合肥工业大学资源与环境工程学院,安徽,合肥,230009 |
| 基金项目： | 安徽省优秀青年科技基金 |
| 摘 要： | 在土壤元素异常下限值的确定对环境地球化学评价具有重要意义，传统异常下限值计算方法仅适用于元素含量数据呈正态分布的情况，而事实上土壤元素含量的空间分布极其复杂，很可能具有多重分形分布特征，元素背景和异常有各自独立的幂指数关系。本文探讨利用分形方法确定典型工业区土壤中Cd元素的异常下限值。基于分形的含量一面积方法确定了合肥大兴地区（典型工业区）土壤中污染元素Cd的异常下限值为0．445mg／kg，并根据该异常下限值圈定了异常范围。同时与传统方法（平均值加两倍标准离差）确定的土壤中Cd元素异常下限值及异常范围进行了对比分析，结果显示，分形方法圈定的异常区域是有效的、合理的，控制了区内主要的导致土壤Cd元素污染的企业。 |
| 关 键 词： | 分形 Cd元素 异常值 土壤 合肥 |
The Determination of the Singularity Thresholds of Soil Cd in Daxing,Hefei Using Fractal Method |
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| Wang Wei,Zhang Yinghui,Yuan Feng,Li Xiangling,Zhou Taofa.The Determination of the Singularity Thresholds of Soil Cd in Daxing,Hefei Using Fractal Method[J].Environmental Science and Management,2009,34(5):27-30. | |
| Authors: | Wang Wei Zhang Yinghui Yuan Feng Li Xiangling Zhou Taofa |
| Institution: | 1.Hefei Institute of Environmental Science;Hefei 230041;China;2.Hefei Sikang Environmental Scientific and Technological Consulting Company Itd;3.School of Resources and Environmental Engineering;Hefei University of Technology;Hefei 230009;China |
| Abstract: | It is of great significance to determinate the singularity thresholds value of elements in soil for environmental geochemical evaluation,the traditional way of the singularity thresholds value is only suitable to the element data that is normal distribution.Nevertheless,the spatial distribution of chemical elements in soil is extremely complicated,which has the multi-fractal distribution characteristic possibly,and the background and anomaly values of elements usually show independent power index relationsh... |
| Keywords: | fractal method Cd element the singularity threshold soil Hefei |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |