Study On The Quality Of Living Environment Of Changsha Based On PCA & AHP

With the aggravation of the urbanization process and the intensive yarding of urban population, the public have been raising higher demands on the living environment. The ecological environment of human settlements and its sustainable development have become the hot topic in the whole world. Changsha, as the the provincial capital of Hunan Province, constructing a sustainable and healthy developing settlement has a very important meaning to the economic development and the social progress of Hunan.This paper was based on the survey of domestic and international urban residential environment theory and evaluating method combines with the actual conditions of Changsha. According to the data from 1999 to 2008, the paper constructs the evaluation index system of Changsha settlements, using the analytic approach of the level and main composition analytic approaches. Positive research of the living environment of Changsha has been made from the ecology, economy, culture and service, and draw to the following conclusions:1. Constructing the Habitat Evaluation Index System of the environment from four respects, to evaluate the quality of living environment of Changsha city through quantitative analysis method. The results showed that during the study period, Changsha's living environment increased year by year, growing faster especially after 2000.2. It was emphasized in the article that the development of living environment of Changsha was mainly limited by the relatively backward economic development level. The better situation of economy, the more guarantee to improve the other system.3. Urbanization had contributed to the quality of population greatly and the rise of per capita incomes, however, at the same time, it exerted a great pressure on the environment, making the "three wastes" emissions increase and hindering the development of ecological environment and the improvement of living environment.4. The main measures to improve the living environment of Changsha and to achieve the sustainable development of the living environment of Changsha were the following: speeding up the adjustment of industrial structure, vigorously developing a low carbon economy, expanding social security coverage, increasing investment in the field of cultural construction, promoting a rapid and stable development of the economy in the range of ecological tolerance.