首页|The Study of Taichung Area Land Use Change on Heat Island Effect
The Study of Taichung Area Land Use Change on Heat Island Effect
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In the past 40 years, Taiwan has high degree of industrialization and rapid economic development, resulting in the increase of energy use by nearly 20 times and higher plant density and energy consumption rate per unit area. Therefore, the heat island effect in Taiwan has become an urgent and significant issue about living environment. Urban heat island is mainly due to the artificial impermeable pavement used to replace the original ground surface. The replacement has caused unbalanced temperature and made higher temperature at urban areas than the rural ones. With the development of spatial information technology, the remote sensing has advantages of high spectral rate, multi-scale images, multi-temporal and fast data acquisition. The application of remote sensing has been focused on urban heat island study nowadays. In this research, the remote sensing was used to analyze the land-use change, and their impacts on the effect of urban heat island in Taichung. In this study, the thermal infrared band images generated by the Landsat satellite were used to estimate the surface temperature change. National land use data was applied to analyze land use change of Taichung. The study also discussed the correlation of land use and urban heat island. The results indicated that land surface radiation temperature increased 2 Kelvin degrees in average within 14 years. In addition, the temperature at central area is obviously higher than rural area. The area which premier affected by heat island is increased 13%, which can be recognized as artificial land and some other uses where located at prior Taichung City and western part. On the other hand, the area which has less influence from heat island is decrease 9%, which can be recognized as vegetation land and water where located at eastern part.
remote sensingurban heat island effectland surface temperature
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