The Research On Microclimate Effect Of The Three-dimensional Morphology On Urban Waterfront Green Space Vegetation

A city is a region with high population concentration,high building coverage and frequent economic activities.In recent years,the contradiction between urban development and ecological environment intensifies,and the problem of urban heat island effect is serious.Faced with the challenge of urban climate environment,relevant scholars have developed a series of climate adaptation measures and mechanisms to alleviate the environmental problems caused by human activities.Relevant disciplines of urban planning have also begun to explore the law of climate adaptability of urban construction from the perspective of sustainable development,so as to better build an ecologically livable city.Waterfront green space is an important ecological landscape space in a city,which has important ecological functions in purifying air,regulating climate,and conserving water.Numerous studies have shown that water and green space can significantly improve urban ecological and climate effects,and improve human comfort perception.However,there are relatively few studies on the micro-climate of relatively small scale waterfront green space vegetation structure,which are mainly focused on the verification of simulation software and the construction of vegetation morphology model.A complete three-dimensional vegetation structure simulation research system has not yet been formed,and studies on the climatic effects of water and vegetation structure from the perspective of water-green coordination are relatively lacking.Based on this,this paper uses the ENVI-met numerical simulation software as a tool,carrys out tests on the relevant sections of vegetation modeling,compares the simulation results with the measured results,and verify the scientific of the software for vegetation simulation.Based on the climate environment conditions of Shanghai,an ideal model are established to analyze the climate effect characteristics of water elements,vegetation types,spatial configuration and three-dimensional forms of vegetation.The spatial configuration structure takes from the perspective ofvegetation planting density,vegetation configuration and planting form,discusses the change rules of climate-related factors to provide a theoretical basis for waterfront green space planning and design.For the three-dimensional morphological structure of vegetation,the paper refers to the actual canopy and branches attributes,picks up tree height,crown width,height under the crown,crown type,leaf area index and living vegetation volume as the factors.Then the climate effect for air temperature,relative humidity,wind speed and physiological equivalent temperature characteristics are analyzed from the horizontal and vertical space level.Finally,according to the research conclusion,the actual waterfront green space is optimized to improve the ecological landscape and climate environment.The further optimization strategy of the micro-climate effect of waterfront green space are summarized,in order to promote the construction of a livable and comfortable waterfront green space ecological landscape space.