普通克里金法与泰森多边形法在土壤污染模拟中的应用对比  

Comparison of the Application of the Ordinary Kriging and Thiessen Polygons Method in Soil Pollution Simulation

作　　者：周宜一 汤传栋 陈国伟 崔志强 ZHOU Yiyi;TANG Chuandong;CHEN Guowei;CUI Zhiqiang(Mingrui Environmental Technology(Nanjing)Co.,Ltd.,Nanjing,Jiangsu Province,210000 China)

机构地区：[1]铭瑞环境科技(南京)有限公司,江苏南京210000

出　　处：《科技资讯》2023年第20期164-167,202,共5页Science & Technology Information

摘　　要：以某苯并[a]芘污染地块为例,采用普通克里金插值法与泰森多边形法分别模拟污染范围,对比两种方法的模拟结果差异影响因素与实际操作应用的优缺点。普通克里金法可直观反映污染物含量梯度变化,泰森多边形法插值结果不确定性较普通克里金法更高;普通克里金法一般需要多项软件配合进行模拟与结果分析,泰森多边形法在操作使用方面有明显优势;泰森多边形法插值结果可直接用于后续分层施工定界,而普通克里金法模插值到的污染范围为平滑曲线,还需进行多项操作以达到定界需求。因此,建议在划定地块污染范围时,对于两种方法模拟结果相近的区域,优先选用泰森多边形法,便于后续修复范围划定与修复施工;对于模拟差别较大的区域,进行加密布点和异常值分析,减少不确定性。A Benzo[a]pyrene polluted plot is taken as an example,the pollution range is simulated by the ordinary Kriging interpolation method and the Thiessen polygons method respectively,and the influencing factors of the difference of the simulation results and the advantages and disadvantages of the practical operation and application of the two methods are compared.Ordinary Kriging can directly reflect the gradient change of pollution content,and the uncertainty of the interpolation results of the Thiessen polygons method is higher than that of ordinary Kriging.Ordinary Kriging generally needs the combined use of multiple software to simulate and analyze results,and the Thiessen polygons method has obvious advantages in operation and use.The interpolation results of the Thiessen polygons method can be directly used for follow-up layered construction and demarcation,but the pollution range interpolated by ordinary Kriging is a smooth curve,which needs multiple operation to achieve delimitation re‐quirements.Therefore,it is suggested that when delimiting the pollution range of the plot,for areas with similar simulation results of the two methods,the Thiessen polygons method should be selected first to facilitate the de‐limitation of the follow-up restoration scope and restoration construction,and that for areas with large simulation differences,the encryption layout and outlier analysis should be conducted to reduce uncertainty.

关 键 词：普通克里金 泰森多边形 土壤污染 污染范围模拟 

分 类 号：X53[环境科学与工程—环境工程]