| Summary: | 碩士 === 國立成功大學 === 都市計劃學系碩博士班 === 99 === The topic of heat island effect is being more and more emphasized in recent years. Since the air temperature in metropolises is getting higher, urban planners and designers have to consider the outdoor thermal and wind environment simultaneously when thinking about the future urban development.
This study focuses on the aspects of wind environment. Firstly, in order to verify the simulation results, the outdoor wind environment was investigated with field measurements. Based on reference of wind environment and human comfort, the evaluated index included tests of average wind speed and SET* human comfort. The most suitable rang of average wind speed were 1.03 m/s?3 m/s and 0.3 m/s?3 m/s for afternoon and night in this study, respectively.
Based on measurement weather data and the regulation of urban planning factors (building coverage ratio (BCR) and floor area ratio (FAR)) in Tainan, the simulations were carried out in summer with 8 scenarios and analyzed by the concepts of space scale and average wind speed mentioned in chapter 5. It was found from the simulation, the Case 3（BCR: 60%, Floor: 3F---FAR:180%）was better proposal of wind environment in this focus area. Lastly, make a breakthrough of FAR’s regulation and the limitation of surrounding building arrangement around the focus area. There were two schemes proposed to improve the comfort of pedestrian wind environment, including increasing building height and adding wind paths.
Through the simulation and evaluation, the current regulations of BCR and FAR in residential areas in Tainan were unsuitable, and the limitation of FAR resulted in worse ventilation. Therefore, this study suggests loosen the limitations of BCR and FAR in order to formulate better proposals for the planning areas. Moreover, the plan of renewing area’s domain always ignores the effect of surrounding environment. Consequently, in order to improve the wind environment, it is necessary to take the surroundings of focus area into consideration.
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