Study the Relationship Between Urban Fabric and the Local High Temperature areas of Heat Island - A case study in Taichung City

Abstract

In recent years more and more research studied the relationship between the spatial pattern of Urban Heat Island (UHI) and its factors however there are still fewer discussions about the differences between the urban fabrics and their relationships with UHI This study chooses Taichung City as the study area The buildings in the city have been converted into a grid with a resolution of 150 m and then divided into 9 building types through multiple density indicators Besides ASTER images are used to draw the UHI intensity (UHII) map LISA is a method to identify UHII clusters The results show that the intensity of UHI during daytime is stronger than nighttime and the temperature in some areas is extremely high Non-heat island areas that are located outside the urban area are not affected by UHI on the other hand urban area and its surrounding areas are impacted by UHI and some of which are greatly affected Finally through the Spacemate plane we see the interaction between the urban fabric and the UHI phenomenon which shows that as the degree of UHII increases GSI FSI and L increase while OSR decreases This applies to non-heat island areas mainly composed of low-rise point buildings as well as heat islands and higher temperature areas mainly composed of mid-rise block buildings whether day or night They all follow this rule: from local high-temperature areas to heat island areas and then to non-heat island areas the urban fabric changes from highly developed and highly intensive to low development and less intensive

Date of Award	2020
Original language	English
Supervisor	Han-Liang Lin (Supervisor)