Analysis of Urban Heat Island Phenomenon and Its Relationships with Land Use/Land Cover Characteristics: Case Study in Bangkok Metropolitan Administration Area

摘要

Main objective of this research is to study the urban heat island (UHI) incidence in Bangkok Metropolitan Administration (BMA) area and its relationships to land use/land cover (LULC) characteristics based on image data taken by the TM sensor onboard Landsat-5 satellite in winter dates of 1992 and 2008. The LULC components were separated into 4 main groups; (1) Urban-built-up, (2) Vegetation, (3) Bare land, (4) Water body. The obtained results indicate that intensity of the phenomenon over BMA region has significantly increased during period of the study, especially over the central districts, and only at Tambon Bang Krajao that the UHI problem was found still not too severe. It was found that great rise in the UHI intensity is contributed mostly from the rapid urban/built-up growth. However, green vegetation and vast water bodies were found to reduce severity of the phenomenon. In addition, relationships of the UHI intensity and LULC components can be expressed in form of the linear equation of land surface temperature (LST) data and the LULC indices like NDVI, NDBI, and NDBal.