在氣候變遷與極端氣候的情況下，促使都市熱島現象加峻，影響人們生活品質及環境舒適度。臺灣常處於高濕熱的氣候環境，因此藉由都市通風散熱的降溫策略，改善熱環境及降低熱危害風險尤為重要。前人研究大多為都市風廊規劃，尚缺乏風廊通風效益之佐證，本研究旨在補足此缺口，並以臺南地區為例，透過都市風廊指認與實測擬證都市風廊的通風效益。
在研究方法上，首先分析官方氣候資料，涵蓋歷史氣候重建、即時觀測與不同暖化程度模擬數據，以檢視臺南地區熱島現象與長年盛行風向，並評估未來升溫趨勢。再者運用地理資訊系統進行地表覆蓋分析與地表粗糙長度演算，據以指認都市風廊、鄰里風廊與連續通風路徑。同時透過風速實測與AKL FlowDesigner風場環境模擬，以此驗證風廊的通風效益。最後基於實證建立廣域尺度之風速推估公式，旨在解決模擬軟體其模擬範圍的限制，以及節省操作所需的時間成本，也針對風速剖面指數律定義都市通風率，並將通風潛力可視化，據以推廣風廊指認與氣候調適之應用。
研究結果發現都市大面積空地具提高風速之效益，相較路寬相同的兩道路，鄰近大面積空地者風速可提升50%。其次，道路走向是否順應主導風向乃影響通風效率首要因素，路寬影響次之，路寬在順應風向的情況下有助於環境風速的提升，高達90%的影響性。最後，交通樞紐十字路口處受雙向通風影響風速相較穩定，通風效率僅介於次要風廊與通風巷道之間。本研究依上述通風效益驗證之數據，建立廣域尺度風環境評估公式，並產製以通風率為核心指標之都市通風潛力地圖，成果可供利害關係人及跨領域專業者應用，作為都市風環境改善與氣候調適規劃之科學依據，進一步協助地方政府於都市設計、法規研擬與降溫策略中導入有效的風環境管制規範，落實提升人居環境品質與促進永續發展之目標。

Climate change and extreme heat have intensified urban heat island（UHI）effects, especially in Taiwan’s hot and humid environment, reducing thermal comfort and livability. Enhancing urban ventilation for heat dissipation is essential to reduce thermal risk. Most previous studies focus on wind corridor planning but lack empirical evidence of wind corridors effectiveness. This study addresses this gap by identifying and validating wind corridor ventilation benefits in Tainan, Taiwan.
The methodology begins with an analysis of official climate data, including historical reconstructions, real-time observations, and warming scenarios, to examine UHI trends and prevailing wind directions. Using Geographic Information System（GIS）analyzes land cover and calculates roughness length to identify urban and neighborhood wind corridors and continuous ventilation paths. Field measurements and FlowDesigner simulations were conducted to assess ventilation performance. A large-scale wind speed prediction model was also developed to overcome simulation limitations and reduce operational costs. Additionally, urban ventilation potential map was produced based on power law profiles.
Results show that large open spaces significantly enhance wind speed up to 50% higher near such areas. Road orientation aligned with prevailing winds is the most critical factor, influencing wind speed by up to 90%, more than road width. Intersection also shows stable wind conditions, benefiting from bidirectional flow. Based on the findings, a large-scale wind environment model and ventilation potential map were developed. These tools support urban design, regulation, and climate adaptation strategies, helping governments implement effective ventilation controls to improve urban quality and sustainability.

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