1、公路交通对土壤铅污染预测评价摘要:推导给出了公路交通对土壤铅污染的预测计算模式,分析了采用该模式预测土壤中铅含量时可能出现的3种不同结果,即高于、等于或低于背景值及其判别条件。结合中国公路交通的实际情况,论证了在不考虑非公路污染源时,公路交通引起土壤中铅累积量在营运近期将低于土壤背景值。认为合理确定非公路污染源强度、铅沉降面积及铅残留系数是影响预测评价土壤铅污染的主要因素。关键词:土壤 铅 预测 模式 公路交通Abstract The pollution prediction models of Pb in soil due
2、to highway transportation are deduced.The available three different results,i.e.greater than or less than or equal to the background value,and theirdiscriminantes are discussed while the models are used to predict theamount of Pb in soil.On the basis of the situati
3、on of highway transportation in China,it is proved that the amount of Pb in soil is less than the background value during the short operation phase of highway,if the other pollution sources are not considered.It is believed that rationally taking the non-highway po
4、llution source,the precipition area and the remaining fraction of Pb into account incalculation are the major factors that affect the accuracy of predicting results.Key words Soil Pb Prediction Model Highway transportation1 引言 自1987年起中国开展公路建设项目环境影响评价工作以来,已有200多本公路