| 基于GIS的农田土壤重金属空间分布研究——以山东省泰安市为例 |
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| 引用本文： | 李瑞平,姜咏栋,李光德,周楠楠,于冲,候存东.基于GIS的农田土壤重金属空间分布研究——以山东省泰安市为例[J].山东农业大学学报(自然科学版),2012,43(2):232-238. |
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| 作者姓名： | 李瑞平 姜咏栋 李光德 周楠楠 于冲 候存东 |
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| 作者单位： | 1. 山东农业大学资源与环境学院 山东泰安 271018
2. 泰安市环境保护监测站,山东泰安,271018 |
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| 摘 要： | 以山东省泰安市为例,研究其农田土壤中重金属的含量与分布状况。采用ArcGIS中地统计分析模块研究土壤中重金属分布的空间变异性,应用Kriging方法进行空间插值作图。结果表明:研究区土壤中的重金属含量除Pb外均已超出当地背景值,土壤重金属含量的变异系数较大的是Ni和Zn,其余重金属变异系数相对集中。空间分布上,Cu的空间相关性较强,Cr、Zn、Ni、Pb和Cr居中,而Hg较弱。插值结果显示,土壤中Cd污染由西向东加重的趋势,高含量区主要集中在东部的新泰市,Pb的污染范围比较广,Cu的含量由东向西逐渐增加,高含量区主要是新泰市,Cr的分布为西部和东部高而中部较低,即高含量区具体到新泰市和东平县,Zn和Ni的高含量区主要集中在东部的新泰市,Hg的分布趋势是由北向南逐渐增加,高含量区集中在南部的宁阳县。
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| 关 键 词： | 农田土壤 重金属 空间分布 ArcGIS |
THE SPATIAL DISTRIBUTION OF HEAVY METALS IN THE CROPLAND BASED ON GIS |
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| LI Rui-ping
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JIANG Yong-dong
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LI Guang-de
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ZHOU Nannan
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YU Chong
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HOU Cun-dong.THE SPATIAL DISTRIBUTION OF HEAVY METALS IN THE CROPLAND BASED ON GIS[J].Journal of Shandong Agricultural University,2012,43(2):232-238. |
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| Authors: | LI Rui-ping JIANG Yong-dong LI Guang-de ZHOU Nannan YU Chong HOU Cun-dong |
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| Institution: | 1.College of Resources and Environment,Shandong Agricultural University,Tai’an 271018,China; 2.Environment Protection Monitoring Station of Tai’an City,Tai’an 271018,China) |
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| Abstract: | The given study has been performed in a soon-to-be urbanized region in Tai’an county,Shandong,which includes six small towns in hoping to investigate the content and the spatial distribution of heavy metals in the crop fields around the above towns.Our study has been done based on the geo-statistic approach by using ArcGIS with a distribution map drawn by means of Kriging method.The results of our investigation have shown that the actual content of all the heavy metals except Pb in the soil is over their original background level,with the variance index of Ni and Zn being the highest,that is,85.4% for the former and 75.6% for the latter.The results of spatial distribution analyses show that the ratio of nugget to sill of Cu,Zn,Cd,Cr,Pb,Ni,Hg was 23%,60.54%,27.88%,36.32%,63.48%,42.95%,75.61%respectively,with their range of 2.0 km,2.2 km,15.0 km,12.5 km,15.6 km and 3.6 km respectively.This suggests that Cu have the strongest spatial correlation,with Zn,Ni,Cd,Cr,Pb keeping the moderate spatial correlation,and Hg the feeble spatial correlation.And,finally,the spatial interpolation map reveals that the seven elements mentioned above have the different spatial distribution characteristics.The high remainder of Cu,Zn,Cr,Ni content has been found in the east of the region-Xintai,though the content of Hg decreases gradually from the south to the north,with Cr being higher in the west and east but lower in the middle,while Pb being richer in the west and middle but fewer in the east.In addition,various distributions have been found influenced by the double factors:human activity for their well-beings and the soil itself,which suggests that we should learn to use land properly and wisely in a well-planned way for the benefit of the local people in the future. |
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| Keywords: | Cropland soil heavy metal spatial distribution ArcGIS |
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