CAJ | 학술논문

以浦江县农田土壤样点试验值为基础，运用Kriging插值、地质积累指数等方法，探讨浦江县土壤重金属的空间分布特征、污染状况及产生原因，结果可为重金属环境影响评估提供方法借鉴。通过Kriging插值分析发现，浦江县五种重金属含量均存在空间分异现象，分布特征呈现类聚式相似性。Cr、Cu、Cd三者之间和Hg、Pb二者在土壤中分布的重置率较高，但后二者与前三者之间的空间格局相似性较差。重金属本身习性与土壤对重金属的吸附能力差异是促其空间分异的主要动因。单项污染指数频率测算结果表明，浦江县土壤Cd和Hg污染频率分别达到91.26%和96.18%， Cr、Cu、Pb尽管出现污染的区域较少，但已有较多区域接近临界值。因此，有针对性地防治重金属污染将是该县农田保护的重要内容。
이포강현농전토양양점시험치위기출，운용Kriging삽치、지질적루지수등방법，탐토포강현토양중금속적공간분포특정、오염상황급산생원인，결과가위중금속배경영향평고제공방법차감。통과Kriging삽치분석발현，포강현오충중금속함량균존재공간분이현상，분포특정정현류취식상사성。Cr、Cu、Cd삼자지간화Hg、Pb이자재토양중분포적중치솔교고，단후이자여전삼자지간적공간격국상사성교차。중금속본신습성여토양대중금속적흡부능력차이시촉기공간분이적주요동인。단항오염지수빈솔측산결과표명，포강현토양Cd화Hg오염빈솔분별체도91.26%화96.18%， Cr、Cu、Pb진관출현오염적구역교소，단이유교다구역접근림계치。인차，유침대성지방치중금속오염장시해현농전보호적중요내용。
On the basis of the farmland soil sample test value in Pujiang County, this paper used Kriging interpolation analysis, index of geoaccumulation and some other methods to discusse the spatial distribution characteristics, pollution status and reasons of Pujiang soil heavy matals. The results could provide theory method for environmental impact assessment of heavy metals. By using Kriging interpolation analysis method, we drew a conclusion that the spatial distribution of 5 kinds of heavy metals contents were different in Pujiang County, and the distribution characteristics presented a cluster similarity. The distribution between Cr, Cu, Cd and the distribution between Hg and Pb both had a high reset rate. But the spatial patterns were quite different between the former three and the latter two. The behaviors of heavy metals and the differences of soil's adsorption ability of heavy metals were main reasons for their space differentiation. The results of single pollution index frequency estimation indicated that soil Cd and Hg contamination frequency respectively reached 91.26% and 96.18% in Pujiang County. Although the pollution areas of Cr, Cu, Pb were small, more areas were close to the critical value. As a result, targeted prevention and control of heavy metal pollution was the important content of farmland quality protection in Pujiang County.