Research On The Construction And Planning Of Urban Ventilation Based On Urban Morphology And Surface Roughness

With the acceleration of urbanization and the depletion of natural resources,modern urban development is facing great atmospheric environmental problems,such as urban heat island effect,haze,and poses great challenges to the sustainable development of the city's economic,social and ecological environment.The full utilization of natural resources will be the inevitable trend of large-scale urban construction.Urban ventilations have a positive effect on improving urban air quality and improving human health.Good urban ventilation can lead to clean and cool air flow to hot and humid areas,effectively alleviating the city's heat island effect.In this paper,through the in-depth study and analysis of urban form and surface roughness,this paper explores the potential ventilations in the city as the basis of wind tunnel planning,and the construction activities such as urban land use,land classification,street design,open space setting and architectural form design To improve the environmental quality of Shenzhen city wind,to improve the continuous high temperature conditions in summer,reduce heat island effect,improve environmental comfort,to further build ecolivable city to provide a strong planning guidance.This paper from the urban ventilation construction technology method,and tries to provide scientific and reliable theoretical and technical support for urban ventilation planning.The study of Shenzhen City,for example,the use of frontal area density indicators to measure urban surface roughness,scientific quantification of urban landscape on the impact of the wind environment.Numerical Simulation With the help of Arc GIS software platform,the urban morphological parameters was selected to construct the urban airway simulation model.The wind area density calculation weights the wind direction data of different wind directions,making the result more comprehensive and accurate.And then use the least cost pathway method to explore the potential ventilation corridor of the city,and select the test points inside and outside of simulated ventilations,actual measurement and compare the average wind speed,average temperature and average humidity data of each test point.The measured results confirm the reliability of the computer numerical simulation.And then integrate the urban ecological landscape resources,relying on ventilation corridor,open up the city ecological corridor,delineation of urban ventilation.At the end of this paper,the paper discusses how to incorporate urban ventilation planning into the planning of urban master planning,urban design and so on.By strictly controlling the construction activities in urban ventilations,guiding urban renewal and new projects,making full use of urban natural conditions and developing urban ventilation potential Improve the microclimate within the city,improve the thermal comfort,promote the quality of urban living environment.