Study On Mountain Microclimate In Xiangshan Park Based On ENVI-met Simulation

In recent years,with the rapid development of economic globalization and the continuous improvement of urbanization,a large number of urban green spaces have been replaced by artificial buildings.Human activities have greatly changed the ecological environment of cities,seriously affecting human health and living environment.The contradiction between people’s comfort needs outside and climate issues is becoming increasingly prominent.By optimizing environmental design strategies and fully utilizing existing natural resources and climate conditions to improve the urban microclimate environment,it is one of the feasible solutions to solve climate problems,improve people’s quality of life outside,and promote sustainable urban development.This paper combines the landscape architecture and terrain factors,expounds the summary of microclimate related theoretical research,summarizes the macro climate background of Beijing,the annual meteorological parameters,and summarizes the ideal microclimate model of Beijing.Taking Xiangshan Park as the research object,seven out of six scenic spots in the royal garden Xiangshan Jingyi Garden were selected as measurement points.Each season of the year was selected as a time period of three consecutive days,and meteorological parameters such as temperature,wind speed,and humidity were observed at fixed points.The impact of terrain factors,garden elements,and garden spatial patterns on the mountain garden microclimate was analyzed,and the measurement points were classified based on spatial types to explain the relationship between microclimate and spatial enclosure The connection between garden environment and terrain elements.Analysis shows that terrain has a significant impact on meteorological factors.Under certain conditions,the higher the altitude,the lower the air temperature and the higher the relative humidity;The wind speed is high at mountaintops,ridges,and convex terrain,while the wind speed in valleys is low,and the wind speed in basins is the lowest;The undulating terrain largely determines the solar radiation situation of the environment,and the changes in direct sunlight angle in different seasons also affect temperature.Next,select the summer and winter seasons with less comfortable microclimates,use ENVI-met software to model and simulate,and conduct comfort evaluation to summarize the impact of terrain,architecture,plants,and water elements on microclimate in the summer and winter seasons,as well as the improvement effect of garden spatial layout on microclimate in Chinese classical gardens.Finally,summarize and summarize the spatial patterns of gardens with pleasant microclimates in summer and winter: in summer,clever garden layouts should be used to reduce the intensity of solar radiation,increase the function of shading and avoiding heat,strengthen ventilation,promote air flow,and increase appropriate humidity to alleviate dry heat;In winter,time and space should be provided to absorb sunlight,enhancing wind shelter,insulation,warming,and humidifying effects.In spatial processing,buildings and plants are used in summer to effectively guide the summer monsoon and local valley winds,enhance wind speed and air flow,and tall trees,rocky rockeries,and buildings are used to shelter them.They have a cooling and humidifying effect in shaded areas;In winter,a closed place with wind protection is set to block the passage of cold wind in winter.When the solar elevation angle is low,plants can be prevented from blocking the sun’s rays,which is convenient for warming.