夏季都市熱島效應已造成都市內難耐的溫熱環境，提升都市風環境具有改善室外與室內熱舒適與驅散汙染等功能，為改善熱島效應良好的策略，於中尺度下判定都市內之粗糙度則有助於找出都市風廊道，引入周邊郊區風與海風以改善都市熱島效應。
本研究以都市型態學法指標(Frontal area index,FAI) 做為計算研究範圍內地表粗度的方法，代入6~8月夏季盛行風向南風與西風做為計算參數，得到結果為研究區域內中西區、北區、南區具有較高的 λ_(f )值，安南區與安平區西邊具有較低的 λ_f 值，就整個研究範圍而言，以西風計算的λ_f值高於南風，代表西風於研究範圍內較不容易進入。
本研究假設風會沿著較低的地表粗度前進，故以最小成本路徑法(Least cost path, LCP)計算南向北與西向東總共39條最低FAI累加路徑，得到研究範圍內具有南向北共3條與西向東共5條的FAI風廊道，並以計算流體力學(Computational fluid dynamics, CFD)進行驗證，以LCP法所計算出的FAI風廊道與CFD疊圖分析後發現路徑上風速皆有高於周邊風速的現象，因此判定LCP法於預測都市內風廊道則具有一定解釋能力。
另一部分探討對於都市溫度具有潛在影響的土地使用，並計算於100m X 100m大小網格內的面積，製作都市潛在升降溫圖，發現研究區域內主要聚有潛在升溫地點集中於安平工業區、中華西路、文賢路等主要道路其於零星散布於研究區域西側，研究區域具潛在降溫潛力的區域則集中於研究區東側海面、台江內海、與西北邊鹽水溪與周邊農業用地，利用最小成本路徑法計算西向東5條與南向北4條具有最高潛力降溫之路徑。
經由上述分析將FAI風廊道與潛在升降溫度圖疊圖分析後，發現研究區域內4處FAI風廊道交會地點具有較高的都市潛在升溫潛力，並提出以鋪面改善之對策。以都市潛在升降溫度圖層進行LCP計算，得到計畫區右側具有一條潛力降溫路徑，須降低此路徑上風向投影面積12245m^2以創造FAI風廊道流經於此潛力降溫路徑。

In summer, the heat island (HI) effect of the city has created the unbearable, extremely hot environment in the city.
The emphasis of ventilation should bring the advantages of reaching the comfortable temperature both indoors and outdoors and to disperse the pollutions.
The proper strategy of making the heat island effect improved is to find the ventilation path by ranging the degrees of roughness in the city. Through the ventilation path and the breeze from the suburban or the ocean would be also considered with being able to change this effect.
The main equation of morphometric, Frontal area index (λ_f), is used to calculate the surface roughness in this research.
To substitute the common wind directions, south wind and west wind, from June to August, the west district and the south district reveals the higher λ_(f ); on the contrary, Annan district and Anping district shows the lower λ_(f ).
Throughout the whole research area, the λ_(f ) calculated with the west wind is higher than the λ_(f ) effected by the south wind. It turns out that in the investigation area, it exists more difficulties in bringing the east wind in.
The wind may process along the lower surface roughness has been hypothesized in this research. To calculate by LCP least cost path, there are 39 lowest progressive paths from south toward north and east toward west. The data have been found from the investigation area would be 3 FAI ventilation paths of the direction, south toward north, and another 5 FAI ventilation paths of the direction, west toward east. This data have been proved by CFD Computational Fluid Dynamics. Moreover, through the analysis of FAI ventilation path calculated by LCP and CFD, the wind velocity in the path is more significant than the wind velocity around the path. It indicates that LCP could be applied in ventilation path.
The potential influence of the land usage to metropolis temperature is also discussed in this research. From the figures of potential temperature increasing and decreasing within the size of 100m X 100m, discovered that the heat areas of all the investigation area are mostly the master roads in Anping industry area, Zhonghua West Rd., and Wenxian Rd. The rest locations are discovered in the eastern part of the investigation area, and the area which might exist the cooling potential would be gathered in the western sea surface, the inner sea of Taijiang, west-northern salt water books, and the farmland surrounding.
To figure with LCP least cost path, 5 paths in the direction from west toward east, and another 4 paths in the direction from south toward north perform the highest potential to cool down the temperature.

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