在日間(至 17:00 前)WBGT 的溫度高低排序為 S4＞S1、S3、S5＞S2，而 17:00 過後則 是 S3、S4、S5、S1、S2，S2 的溫度都維持於相對低溫的狀況；而 S1、S4 的日間與夜間 溫差大；白天高溫、晚上低溫；而 S3、S5 的溫度變動幅度較小，因此在夜間相較於溫度 變動大的測點高溫。
圖 30 2012/10/13 指南路熱舒適性實測－綜合溫度熱指數折線圖
圖 31 2013/03/23 指南路熱舒適性實測－綜合溫度熱指數折線圖
圖 32 2013/07/24 指南路熱舒適性實測－綜合溫度熱指數折線圖
表 8 量測日之綜合溫度熱指數的平均溫度表
（ ）Average S1 S2 S3 S4 S5
2012/10/13 25.24 24.79 26.23 26.28 26.37 2013/03/23 23.49 22.30 23.36 23.79 22.87 2013/07/24 29.20 28.67 29.63 30.43 28.91
6. 小結
人體對於環境的熱舒適性感受，會基於各種不同因素，包括環境氣溫、濕度、風速、
平均輻射溫度、人體活動量、衣著量…等因子，而本研究因為儀器、人力資源有限等因 素，所以只針對乾球溫度、濕球溫度、黑球溫度進行與量測討論，並採用綜合溫度熱指 數(WBGT)來衡量各點的街道環境熱舒適程度。在同一條正東西向街道上，最遠距離只有 450 公尺的五個測點，其溫度差異應該會不明顯，溫度變化上會趨於一致，但是五個測點 基於其周遭環境的不同，影響因素為有無建築陰影、綠化遮蔽、通風條件等，產生出明 顯的溫度差異與不同變化趨勢，以下分三組進行各測點之說明。
(1) 有綠化植栽且良好通風環境的低溫組 S1、S2：S1 相對於 S2 而言，因為在日間
側有綠化植栽，其蒸發散熱使 S2 的溫度會比周遭的溫度低，而面向三岔路的路
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