| Since the rapid development of modern urbanization,the particles generated by human life and production mixed together to form aerosols,which firmly covered the city and easily formed a static wind state,making the air pollution in areas with high density and poor ventilation quality even more serious.The combination of meteorology and urban construction-related disciplines by means of urban ventilation to alleviate the haze and heat island effect measures for the governance of urban air problems brought a new idea.At present,the construction of urban ventilation system is in full swing in many countries and cities.In this background,this paper utilized the announcement of China's environment and a large number of documents and monographs,government documents,etc way,consolidate the existing urban ventilation corridor built cities list and related content,found that small and medium-sized industrial cities are often among the ranking the reciprocal of the national air quality,and ventilation system of the city,very few dabbled in to this kind of city.Therefore,this paper,from the perspective of landscape architecture,aims at improving ventilation effect and optimizing air quality,and explores how to construct a multi-functional ventilation green corridor with air conveying and attached greening remaining and absorbing some air pollutants,which is suitable for small and medium-sized industrial cities.The specific method is as follows: according to the relevant theories of urban wind environment and the actual situation of small and medium-sized industrial cities,the components of ventilation green corridor are condensed,namely,tuyere zone,action space,ecological compensation space,air-guided passage,repatriation zone,etc.The air channel is composed of main air channel,intersection point and connecting air channel.Then,based on the site analysis of ArcGIS platform,the basic data and geographic information collected from various aspects about urban wind environment were used to locate the tuyere zone,action space,ecological compensation space,main wind channel and repatriation zone by combining qualitative and quantitative methods.Computational fluid dynamics was used to simulate the wind field in different functional areas of the city and to determine the air duct of the main body.Based on the elements of ventilation green corridor identified above,the network system of ventilation green corridor is concluded.In order to further prove the feasibility and universality of theconstruction method in this paper,a typical small and medium-sized industrial city(Jiaozuo city)is selected as a case study.In the process of constructing Jiaozuo ventilation green corridor,in order to ensure the balance of daily air exchange in and out of the city,the main air duct is designed: four first-level air ducts,such as Jinxin expressway--Changji expressway,and 10 second-level air ducts,such as Zhongnan road--Fengshou road--Puji road--Shiji road--Zhongyuan road--Yingshi road.In addition,in order to make full use of the public green space inside the city and comprehensively improve the ventilation effect in the high-density area,8communication channels,such as the new garden road,are proposed.Finally,the evaluation of the construction of Jiaozuo ventilation green corridor is taken as the scientific,feasible and universal discussion of the construction method.In addition,Suggestions for the implementation of the plan are put forward according to the case of Jiaozuo city,that is,focusing on the control of the central urban section of the main trunk canal of the South-to-North Water Diversion,the optimization of the inner linear space of the group in the north,and the protection of the tuyairs in the group in the south.This paper makes a preliminary discussion on the construction method of ventilation green corridor in small and medium-sized industrial cities,hoping to provide reference for the construction of ventilation green corridor in such cities. |
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