Research On Comprehensive Evaluation Of Brownfield Update

"Brownfield", in our country also known as "contaminated site "or" brown land", is refers to the once due to improper development and lead to the existence of a real or potential harmful pollutants and its impact on the development process of land, from the nature of the land look to industry with mostly, there are a number of commercial land and port land and so on, size and scale, but their common point is there was land pollution. This kind of land because of the pollution problems of actual or potential, can not be used directly, often in idle or inefficient use of state[1].At present,our country is in the transformation and upgrading of the economic structure and the rapid advance of the important development stage of socialist modernization construction, the rapid expansion of cities makes originally located in the outskirts of the city industrial land has now become the center of the city land, the industrial enterprises to the city in the high value of the land utilization from extensive already can not adapt to the economic and social development needs,but due to the existence of actual or potential pollution problems of the urban land has not been very good use. At the same time, the traditional through expropriation of farmland surrounding the city has to meet not urban construction demand, and these excellent City Central Plains and some of the old community, shanty towns, villages and other city land after all these years in full swing of the urban renewal movement has been basically completed the transformation of. Therefore, city in the "Brown" will become protagonist of urban renewal.The status quo of the research to the "Brown" in the academic circle of our country is mainly to the introduction of foreign "brownfield" connotation, classification, management tools, environmental responsibility, interests of the participants and the legislation, and mostly rely on foreign successful cases, little research on "brownfield" update the benefit evaluation, and a deeper level. Comparative analysis method are applied in this paper, through the analysis to the domestic and foreign scholars on the concept of "brownfield" contrast, boldly put forward the connotation of China "Brown" is refers to the inner city there is a certain pollution or waste of idle land, industrial land mostly. Then from "brownfield" updates are experiencing problems, "Brown" governance of technical means, "Brown" updated evaluation research and "brownfield" update Legislation Research of domestic and foreign "brownfield" update process are summarized, and concludes that the main problems existed in the "Brown" research in our country is the theoretical research foundation is weak, broad and lack of depth, failed to base on the national conditions and other issues. Then, according to the different nature of the land, were selected cultural and creative industrial land, commercial land, residential use of the land, public space and mixed use of five "Brown" update model of the success stories are briefly introduced in this paper. At last, the application of analytic hierarchy process method from social benefit, economic benefit and ecological benefit three aspects of a total of 12 indicators constructed "brownfield" update project evaluation index system and on brownfield land use updating comprehensive benefit evaluation.In addition, this paper through empirical research, analyzes the Wuhan heavy machine tool plant site plots "brownfields" utilization, construct the perfect city "brownfield" updating land use efficiency evaluation index system, for "brownfield" updating land use efficiency were analyzed. The results show that the main conclusions and puts forward the countermeasures and suggestions, provide the effective basis to update project benefit evaluation for similar "Brown".