单要素评价

矿山现行的环境影响评价及其提交的环境影响报告书，是将矿山开发视为单个建设项目且只注重污染物排放和简单数量分析的单要素评价。

Environmental impact assessment and environmental impact statement are single factor assessment that take the mine exploitation as single construction project and lay stress on pollutant emission and simple quantitative analysis .

现参照地下水脆弱性评价的DRASTIC指标，采用指数分析方法，进行单要素因子评价。评价结果表明，大庆市主城区地下水脆弱性由西向东，由北向南呈现逐渐降低趋势。

Taking Daqing main city as the example , according to the DRASTIC index of groundwater vulnerability , the single factor was evaluated .

单要素环境质量评价数学模式分析与探讨

Study on maths mode analysis of environ & mental quality evaluation of single element

本文首先就研究的背景和意义做了论述，并对相关理论、环境承载力的研究现状以及存在的不足加以阐释，确立了单要素的环境评价方法。

Firstly , this paper describes the research background and meaning . Then it describes the status and deficiency of the related theory and the environmental carrying capacity . And it establishes the environmental assessment method of the single element .

本文从自然条件单要素分析和综合评价相结合的角度出发，探讨了川南主要自然条件对发展耕作业特别是发展粮食作物的影响。

By using single-factor-analysis method and synthetical evaluation appr each , the paper examines the influences of the major natural environ mental factors upon agricultural cultivation , especially upon cereal-crop production in Sichuan province .