Research On The Correlation Between Urban Morphology And Microclimate At The Urban Scale Based On LCZ Classification

While urbanization brings many opportunities for social and economic development,the urban environment changes the urban microclimate a lot,causing many negative effects such as the heat island effect,air pollution,and abnormal precipitation.Urban morphology is an important part of the urban environment.At the macro level,research on the relationship between urban morphology and urban microclimate at the urban scale is of great significance for understanding and optimizing urban microclimates and guiding urban design.Urban morphology is an important part of urban morphology.As an important attribute of urban form,urban form pattern has attracted the attention of architecture,meteorology,ecology and many other disciplines.At the urban scale,the urban morphology pattern is the distribution of urban types and building parameters.The differences in urban morphology patterns produce different surface heat and aerodynamic forces,which affects the urban microclimate.In the past research on urban morphology and urban microclimate,due to technical limitations,it is difficult to provide a practical reference for urban design: when quantifying the distribution of urban types,the landscape pattern index in ecology is used to build cities and built types are classified into one;at the same time,the quantification of urban building parameter patterns is limited.In the field of heat island effect research,the Local Climate Zones(LCZ)theory has carried out a detailed classification of urban built types.Different built types correspond to basic building parameters,which provides more detailed urban information for establishing the relationship between urban morphology and microclimate,and has important practical value for improving urban microclimate.Therefore,this article uses the LCZ theory to classify the urban morphology,and on this basis,studies the relationship between the urban morphological pattern and the urban microclimate.At the same time,it quantifies the urban morphology from the type distribution and building parameters,obtains urban microclimate data through WRF(Weather Research and Forecasting Model)model simulation,and conducts quantitative analysis of relevance with the R language.The whole research mainly consists of three sections: data processing and correlation analysis from two perspectives.In terms of data processing,urban morphological pattern data and urban microclimate data are from different platforms to achieve synergy in this article;at the same time,the urban morphological pattern data is initially screened through Pearson correlation.In terms of relevance analysis,on the one hand,through the linear regression analysis of urban morphological pattern indicators and temperature,surface temperature,relative humidity and wind speed,the urban morphological pattern indicators that are strongly correlated with various microclimate elements are extracted to judge the urban microclimate.On the other hand,the sensitivity of urban microclimate was measured by the physiological equivalent temperature(PET)and wind speed in summer and winter.The indexes and characteristic values of urban morphology pattern under different characteristics of urban microclimate sensitivity were extracted by linear regression analysis and K-means cluster analysis.In order to provide reference for urban design,the index system of urban form pattern is established to evaluate the urban climate sensitivity.The whole thesis contains about 43 000 words,78 pictures and charts.