基于 CDE 的城市土壤重金属污染源分析

摘要

In order to solve the problem of urban surface soil heavy metal pollution,the paper takes a city in China as a re-search object,using kriging to draw a spatial distribution map of eight kinds of heavy metal elements,combining single fac-tor index and Nemerow integrated index to evaluate different regional heavy metal pollution,establishing a model based on CDE to determine the source of pollution,so as to prevent and reduce heavy metal pollution from the source.%针对城市表层土壤重金属污染问题，以我国某城市为研究对象，采用克里格插值法绘制8种重金属元素在该城市的空间分布图；将单因子指数法和内梅罗综合指数法相结合，对该城市不同区域重金属污染程度进行评价；基于对流-弥散方程（CDE）建立模型，确定污染源的位置，有助于从源头上预防和减少重金属的污染。