To Assess Comprehensive Urban Environmental Quality with Multi-Factors Space Superposition Assessment Method

The common method used in environmental impact assessment, single-factor assessment, was developed to a new method for assessment of comprehensive urban environmental quality, multi-factors space superposition assessment method. With the help of computer aided designing,the contribution and weight of regional environmental impact factors were analyzed, and the environmental comprehensive assessment of Nanjing were discussed. With case study, this method was proved to be well to express the impact of each factors to environmental quality.