城市表层土壤重金属污染分析  

The analysis on heavy metal pollution of surface soil of city

作　　者：朱晨曦[1] 

机构地区：[1]山东大学(威海)数学与统计学院,山东威海264209

出　　处：《南阳师范学院学报》2012年第6期21-25,共5页Journal of Nanyang Normal University

摘　　要：通过空间插值法将离散点的测量数据转换为连续的数据曲面,采用内梅罗综合指数法和单因子指数法分析土壤重金属的污染程度;基于物质扩散原理,建立重金属污染物浓度与距离空间关系的偏微分方程,利用最小二乘法拟合出参数,进而确定污染源.另外,考虑地表土壤疏松程度、水体流动这两项来优化模型,从而可以更好地研究城市地质环境的演变模式.The paper use spatial interpolation method to transform discrete points of the measurement data into continuous data surface,using the Nemerow index method and the single factor index method to analysis soil pollution.Based on material diffusion principle,we establish the heavy metal pollutant concentration with distance from the spatial relationship of the partial differential equation,using the least squares fitting parameter,and then identification of pollution sources;additionally considering soil loose degree and the water flow to optimize our model,so that we can better study the city geological environment evolution model.

关 键 词：单因子指数法 傅里叶变换 空间插值 内梅罗综合指数法 偏微分方程初值解 

分 类 号：O29[理学—应用数学]