合肥义城地区土壤重金属污染评价中典型插值方法的对比
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摘要
空间插值对于土壤中重金属元素的空间分布及污染评价具有重要意义。对合肥义城地区土壤中的Cu、Pb、Zn、Cd、As、Hg等污染重金属元素,以常用且具有代表性的反距离加权法、径向基函数法、普通克里格法,进行了空间插值的对比验证分析和评价。通过对各种元素的空间插值各种误差进行综合比较的结果表明:Cu、Pb、As元素采用普通克里格法进行插值结果最优,而Zn元素采用反距离加权法最优,对于Cd、Hg元素则径向基函数插值法最优。
Spatial interpolation played an important role in spatial distribution of heavy metals in soil and pollution assessment.Soil sample contaminated by Cu,Pb,Zn,Cd,As and Hg elements in Yicheng district,Hefei were collected and analyzed.We validated and appraised the representative spatial interpolation methods such as inverse distanced weighted(IDW),radial basis function(RBF) and ordinary kriging(Kriging).The results showed that Kriging exhibited best effect in Cu,Pb and As,IDW in Zn and RBF in Cd and Hg.
Spatial interpolation played an important role in spatial distribution of heavy metals in soil and pollution assessment.Soil sample contaminated by Cu,Pb,Zn,Cd,As and Hg elements in Yicheng district,Hefei were collected and analyzed.We validated and appraised the representative spatial interpolation methods such as inverse distanced weighted(IDW),radial basis function(RBF) and ordinary kriging(Kriging).The results showed that Kriging exhibited best effect in Cu,Pb and As,IDW in Zn and RBF in Cd and Hg.
引文
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[2]李小虎,汤中立,初凤友.金昌市铜镍矿区周围土壤中重金属的迁移特征[J].吉林大学学报:地球科学版,2009,39(1):131-136.LI Xiao-hu,TANG Zhong-li,CHU Feng-you.Transfer behavior of heavy metals in soil around Cu-Nimining area in Jinchang[J].Journal of JilinUniversity:Earth Science Edition,2009,39(1):131-136.
[3]马往校,段敏,李岚.西安市郊区蔬菜中重金属污染分析与评价[J].农业环境保护,2000,19(2):96-98.MA Wang-xiao,DUAN Min,LI Lan.Assessment ofpollution of heavy metals on vegetable from outskirtsof Xi’an[J].Agro-Environmental Protection,2000,19(2):96-98.
[4]Ju’nior V V,Carvalho M P,Dafonte J,et al.Spatialvariability of soil water content and mechanicalresistance of Brazilian ferralsol[J].Soil and TillageResearch 2006,85:166-177.
[5]Zhao Y C,Shi X Z,Yu D S,et al.Soil organiccarbon density in Hebei Province,China:estimatesand uncertainty[J].Pedosphere,2005,15:293-300.
[6]Goovaerts P.Geostatistics for natural resources eva-luation[M].New York:Oxford University Press,1997:85-97.
[7]Goovaerts P.Geostatistics in soil science:state-of-the-art and perspectives[J].Geoderma,1999,89(1/2):1-45.
[8]张铁婵,常庆瑞,刘京.土壤养分元素空间分布不同差值方法研究——以榆林市榆阳区为例[J].干旱地区农业研究,2010,28(2):177-182.ZHANG Tie-chan,CHANG Qing-rui,LIU Jing.Comparison of spatial interpolation methods for soilnutrient elements:a case study of Yuyang County,Shanxi Province[J].Agrcultural Reseach in the AridAreas,2010,28(2):177-182.
[9]袁峰,白晓宇,周涛发,等.元素空间分布差值方法的对比研究:以铜陵地区土壤中的重金属元素为例[J].地学前缘,2008,15(5):103-109.YUAN Feng,BAI Xiao-yu,ZHOU Tao-fa,et al.Comparison between method for interpolation ofstudying spatial distribution of elements:a case studyof soil heavy metals in Tongling area,South China[J].Earth Science Frontiers,2008,15(5):103-109.
[10]Davis John C.Statistics and data analysis in geology[M].New York:John Wiley and Sons,1986.
[11]Carlson R E,Foley T A.The parameter R2 inmulitiquadric interpolation[J].Computer MathApplication,1991,21(9):29-42.
[12]Feanke R.Scattered data interpolation:test of somemethods[J].Mathematics of Computation,1982,33:181-200.
[13]Hardy R L.Theory and application of Multiquadric-Bi-Haeminic method[J].Computer MathApplication,1990,19(8/9):163-208.
[14]Powell M J D.The theory of radial basis functionapproximation in 1990[C]//Light W.Advances innumerical analysis.Oxford:Clarendon Press,1992:105-210.
[15]Gringarten E,Deutsch C V.Teacher’s aide:vario-gram interpretation and modeling[J].MathematicalGeology,2001,3(4):507-534.
[16]王学军,李本刚,陶澍.土壤微量金属含量的空间分析[M].北京:科学出版社,2005.WANG Xue-jun,LI Ben-gang,TAO Shu.Spatialanalysis of content of metal microelements in soil[M].Beijing:Science Press,2005.
[17]张仁铎.空间变异理论及应用[M].北京:科学出版社,2005.ZHANG Ren-duo.Theory and application of spatialvariation[M].Beijing:Science Press,2005.
[18]张颖慧.基于环境地球化学基线的合肥地区土壤重金属元素的空间分布及污染评价[D].合肥:合肥工业大学,2007.ZHANG Ying-hui.The study on the spatialdistribution and pollution assessment of heavy metalelements in soil of Hefei area based on environmentalgeochemical baseline[D].Hefei:Hefei University ofTechnology,2007.
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