| Summary: | 碩士 === 國立臺灣大學 === 園藝學研究所 === 87 === From an ecological, climatic specifically, perspective, this paper attempts to devise a urban-design strategy that ensures an ever-lasting co-existence of human beings and the natural environment.
Beginning with a review of related studies, this paper probes into the relations between the urban spatial environment and its climate, and discovers that the physical structure of the urban space, that is, the appropriation of land, has a major impact on the local climate. Therefore, this paper argues that, in an urban planning, the factor of thermal comfort must be introduced into the environment of the urban climate. then this paper proceeds to a case study which, through empirical operation, observes some climatic problems found in for districts in the city of Taipei.
The research methodology is twofold: firstly, the discussion of spatial environment of the city its climatic environment; secondly, the evaluation of thermal comfort . Issues addressed here, nuclide spatial environment, climatic environment , thermal comfort climatic environment is examined in terms of temperature, humidity, and wind speed, with supplementary factors of spatial environment , such as land appropriation and urban construction structure. Data taken from measurement of temperature, humidity, and wind speed are programmed to calculate ComFA.
The research results regarding to climatic characteristics are as follows. 1/ The general climatic pattern of Taipei is one with high temperature in summer and strong eastern wind in winter. 2/ The regional comparisons show that in the Taipei city there are higher temperature, lower humidity, and higher wind speed than in the Taipei county. 3/ The inter-station comparisons done in the Taipei city show that temperature changes more dramatically at daytime, and that wind speed is conspicuously influenced by the density of surrounding buildings.
As for comfort, the research reaches four suggestions as follows. 1/ The daytime temperature in Taiwan tends to be over high all year round, solar radiation being the most important climatic factor, among others, responsible for it. 2/ There is no remarkable difference between ComFA in the Taipei city and county, while it differs more drastically at daytime and nighttime. The maxim daytime ComFA in winter is about 200 W/m2 less than that in summer, and the minimum nighttime ComFA in winter is about 100 W/m2 less than that in summer. 3/ In all the four stations compared, the thermal comfort difference caused by local differences is the most obvious at noon and at midnight. 4/ With the presumption of equal solar radiation, temperature difference is the dominant factor in thermal comfort, and whereas speed functions to modify the feeling of heat caused by high temperature.
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