The Research Of The Construction Of Urban Ventilation Corridor In The Winter Cities Based On Reducing The Influence Of The Haze

In recent years,the problem of atmospheric environment pollution is even more serious with the development of the urbanization process in our country.In which that great risk of haze in the air poses a serious challenge to our strategy of "sustainable development",which has become an urgent requirement in those cities.Through studying about the experience and measures of dealing with haze at home and abroad,this paper has concluded that urban ventilation corridors has a positive effect on dissipating polluted air,improving climate circulation in the cities,reducing air pollution of haze,etc.However,most scholars have focused on the traditional high occurrence areas of haze,such as Yangtze River Delta,Pearl River Delta and Szechwan basin,they has not paid enough attention to the serious haze phenomenon in the Northeast China Regions in recent years,lacking of the systematic approach and concrete measures to the haze in winter cites.Therefore,this paper is intended to be studied from the respective of urban and rural planning.On the one hand,through studying the constitutive factors such as meteorological,geographical and urban spatial form of Changchun,and the analysis of the source of haze,so as to propose the base condition of the ventilation corridor,draw on the basic theories of the new ventilation corridor,and extract its elements including the potential compensation space,the working space and the air guide channels,in the existing urban spatial environment of Changchun.On the other hand,by means of CFD technology,the ventilation environment in the central urban areas of Changchun and the important functional areas will be identified,then we can identify the potential ventilation corridor in urban areas.The final ventilation corridor can be obtained by comparing and comprehensively analyzing the potential ventilation elements and the ventilation corridor identified by CFD simulationmodel.The ventilation corridor is divided into three levels according to the permeability of the corridor,the base condition,etc.As a result,15 urban ventilation galleries of Changchun could be constructed.At last,from the perspective of the urban and rural planning disciplines,the construction of the ventilation gallery is planned and controlled from the regional dimension,the city scale,the block dimension and the construction dimension respectively,so as to ensure the smooth implementation of the planning and the remediation of the ventilation gallery.In the process of building the ventilation corridors in winter cites,we've fully excavated the sources of the haze features in winter cites and systematically studied the theory of the city ventilation corridors.we can obtain Changchun's ventilation corridor by comprehensively analyzing the aspects of the theoretical and the technical recognition of the urban ventilation corridor and studying the city's ventilation corridors,we sincerely expect the research could make some advance in the study of reducing the haze with ventilation corridors in winter cities.