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| 普通克里格评估土壤污染物空间分布精度控制研究 | |
| 引用本文： | 高远,赵玉杰,杨海松.普通克里格评估土壤污染物空间分布精度控制研究[J].农业环境科学学报,2009,28(5). |
| 作者姓名： | 高远 赵玉杰 杨海松 |
| 作者单位： | 1. 中国地质大学研究生院,湖北,武汉,430074 2. 农业部环境保护科研监测所,天津,300191 3. 泰达建设集团奥亚工程管理公司,天津,300456 |
| 摘 要： | 从数据的统计特征分析、异常值筛选及处理、实验半变异函数计算及拟合等方面对普通克里格计算过程中的精度控制问题进行了初步研究,并以天津市东南郊区土壤砷(As)空间分布评估为例,分析了在多步骤精度控制下普通克里格法估计土壤污染物空间分布的可靠性.结果表明,研究区土壤As表现出了明显的累积特征,且监测值为正态分布,异常值较少且为局部异常值,实验半变异函数表现出明显的各向异性.在较严格的精度控制下,普通克里格估值的最优无偏特性可以得到较好的体现,其对土壤As的空间分布的估计精度可以达到较高的水平. |
| 关 键 词： | 普通克里格 土壤 砷 精度控制 |
Precision Control of Assessing Soil Contamination Spatial Distribution Based on Ordinary Kriging |
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| GAO Yuan,ZHAO Yu-jie,YANG Hai-song.Precision Control of Assessing Soil Contamination Spatial Distribution Based on Ordinary Kriging[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2009,28(5). | |
| Authors: | GAO Yuan ZHAO Yu-jie YANG Hai-song |
| Institution: | 1.Graduate School of China University of Geosciences;Wuhan 430074;China;2.Institute of Agro-Environmental Protection;Ministry of A- griculture;Tianjin 300191;3.TTCG AOYA Engineering Management Co.;Tianjin 300456;China |
| Abstract: | In this paper, the statistical characteristics analysis, outliers screening and treatment, experimental semi-variogram calculation and fitting were studied preliminarily as the main calculation process to improve the precision of ordinary kriging interpolation. A case of assessing the reliability of using ordinary kriging under multi-step precision controls to evaluate the soil arsenic(As)pollution in Tianjin southeast suburb was studied. The results showed that the soil As in the study area was marked accu... |
| Keywords: | ordinary kriging soil arsenic precision control |
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