Case Study of GIS Application in Analysing Urban Heating Island Phenomena in Tropical Climate Country

摘要

This study indicates Urban Heat Island phenomena(UHI)in districts belonged to Hanoi city located in tropical climate region.The analysis based on assessment's comparison by applying remote sensing technology.The data captured in partly cloudy days and at night time by satellite Landsat 5,7,8 and is converted subsequently into Land Surface Temperature(LST)range maps.Spatial patterns of UHIs in Hanoi city were examined over the daytime and seasonal variations.Gaussian approximation algorithm is used to quantify spatial extents and measure magnitude for each individual UHIs.Consequently,to determine the relationship of UHIs with surface properties,UHI patterns were analyzed in association with urban vegetation covers and surface energy fluxes derived from high-resolution Landsat 5,7,8 data.A general picture of UHI phenomena in Hanoi city in this study and analyzed results,by applying integrating satellite high-resolution thermal data with land-surface modelling and meso-scale climatic modelling,to further address the impacts of urbanization in local climate cities,propose a framework for sustainable urban planning design in the future.