摘要
依据土壤重金属污染程度的渐变性和模糊性 ,本文采用单因素决定和加权平均两种常见模糊数学模型对土壤重金属综合污染状况进行评价。研究表明 ,单因素决定模型适用于个别参评因子超标过大 ,评价出发点为希望体现单因素否决的情况 ;加权平均模型适用于各参评因子超标情况接近 ,评价出发点为希望体现各个参评因子对土壤重金属环境质量的综合影响的情况。
According to the gradation feature and fuzzy feature in the degree of soil heavy metals' pollution,this paper uses the single factor deciding model and weighted average model to evaluate the soil heavy metals' comprehensive pollution.The study indicates:the single factor deciding model is applicable in the situation that individual evaluation factor is overproof and the evaluation aim is to externalize the principle of single factor rejection;while the weighted average model is applicable in the situation that the contents of every evaluation factors are even and the evaluation aim is to externalize the contribution of every evaluation factors in soil heavy metals' environmental quality.
出处
《环境保护科学》
CAS
2004年第3期53-57,共5页
Environmental Protection Science
基金
国家重点基础研究发展规划 (973)项目 (2 0 0 2CB4 10 810 )
