Study On The Construction Of Urban Heat Island Maps Of Shenzhen Based On Local Climate Zone

With the rapid global urbanization,the urban climate issues such as Urban Heat Island(UHI)effect become increasingly prominent,and the task of combining urban climate subject and urban planning subject has become an important issue for planners and government policy makers.The LCZ(Local Climate Zone)theory which can study how to division of UHI was most particularly concerned.In recent years,many domestic and foreign cities have carried out researches and applications.It can provide a more effective research tool for alleviating UHI and optimizing urban planning strategies,so as to construct an interdisciplinary research platform for Shenzhen UHI climate and urban space study,by refining and visualizing spatial distribution of UHI,analysing the spatial relationship between land use and UHI.LCZ is divided into 17 types of areas in the city of a few hundred to several thousand kilometers in size.It takes 6 parameters as the basis of selection,each climatic region has a typical relative heat island intensity value.The spatial distribution of urban heat island can be simulated by LCZ.As the minimum space element of the urban heat island,LCZ can be divided into macro-meso-micro three levels,of which reaserch scale is LCZ 0 of Shenzhen.By summarizing the research contents and characteristics of the LCZ Maps,and enriching the technical means and tools of this study by the research process and application case of domestic and foreign researchers.Clarifing the mechanism of the three major heat island effects: urban form and function,land cover,urban utilization,combined with the concept of UHI and the LCZ theoretical principle.Based on this,the parameters of the 6 LCZ standard indexes were selected.After all,Optimizing the parameters framework to two main data types of urban form and function and land cover.Using Arc GIS to analyze the overall building density and average height of Shenzhen by 300m*300m meters grid,and divided them into 6 types.Using ENVI to extract Landsat 8 satellite remote sensing,and typing them into 4 surfaces: woodland,grassland,water surface and hard mixed.Overlying all of the 17 standard classification LCZs to 10 more simplified classification of Shenzhen.Using ArcGIS to analyze the correlation between land use types and LCZ.Finally,the two mobile meteorological measurements in summer are determined the UHI of 3 special zones of Shenzhen special areas about Luohu,Futian and Nanshan District,and getting the UHI spatial distribution-strength result map.Based on this,proposing strategies to the urban planning and management.