Typical Areas Of Light Environmental Assessment And Analyze

With the increasing needs of material and cultural,the pursuit of urban light environment has increased people's interest and attention.But so far,researches on the evaluation system and mechanism of urban light Pollution the environment,there are still missing,in the actual process of life,which resulted in the actual situation is difficult to assess the scientific city light environment.And it's restricted the urban light environment design,planning and construction.Therefore,the state of the city's light environment and comprehensive evaluation is urgently needed.Firstly,on the study of the basic theory and technical basis in the light environmental quality's comprehensive evaluation,we can established the light environmental quality evaluation system to make the necessary theoretical study and adequate technical preparation.We finally selected four major categories,a total of 14 indicators,including:illumination extremes ratio,light pollution range,the target brightness,glass curtain wall reflective;the average illumination of residential areas,interior windows vertical illumination,illumination uniformity;uniform illumination of the road surface,the average surface brightness,semi-cylindrical illumination;brightness of advertising light boxes,brightness of LED screen,LED screen color contrast,commercial average illumination.Second,according to the purpose of light environmental quality's comprehensive evaluation.From the viewpoint of scientific,independence,comparability,a reasonable choice of system model can be constructed;based on the basic principles of indicator's determination,choosing the reasonable indicators from a large-scale system of the light environment.Third,take expert's consultation and questionnaire to determined the light of environmental quality evaluation system,and use the software of SPSS to analysis its reliability.? is 0.689,thereby,the correctness of the evaluation system should be determined.Fourth,take the example of Shenyang,to comprehensive evaluation of the quality of light environment,constructing evaluation index system,and using analytic hierarchy process to determine the weight of each index.Based on this,an integrated index evaluation method can be used to comprehensive evaluation the different typical areas of Shenyang,a total comprehensive index was obtained.Generally,the larger the index is,the more bad light environment is,namely,the light pollution generated,and analyzed the pollution mechanism of the area that comprehensive index is more than 1,it can be useful to proposed some rational suggestions on design and construction.Through the study,we can obtain the following conclusions:(1)Compared to other new residential,the old residential' light pollution is obvious,because of the single,backward of lighting.The value of interior windows vertical illuminating of mixed residential and commercial district is 3.05,it became the major factor that influenced light pollution of mixed residential and commercial area.(2)From the viewpoint of each region' average value,the road area pollution is most serious,comprehensive evaluation index was 1.7023;pollution in residential areas is light,comprehensive index was 1.3576.(3)The light pollution is divided into five levels,namely the level ?:0.3?1.0,?:1.0?1.5,?:1.5?2.0,?:2.0?2.5,?:2.5?3.0,the greater of Qi,the more serious of light pollution.? represents not meet the level of light pollution,V represents that expressed serious level.The results showed that:road area belongs ? level,the commercial district belongs ? level and ? level,the residential areas were in grade ? and ?,glass walls belong to ? level and ? level.