淡海新市鎮自1992年公告開發以來，歷經多次停擺與再啟，成為觀察都市化對熱環境影響之典型案例。近年隨核心開發密度快速提升，區域年均溫與高溫日數明顯上升，顯示都市熱島效應逐漸浮現。根據 Oke所提出之都市熱通量架構，其中人為熱與土地使用密度、建築活動與能源消耗密切相關，具可控制性與空間分布特徵。本研究結合Landsat衛星影像、建蔽率與容積率資料，分析2000年至2024年間地表溫度（LST）、植被指數（NDVI）與熱島強度之變化，探討人為熱源主導下的都市化過程與熱環境之交互關係。研究結果顯示，2005年開發暫停期間綠覆回升、熱島效應減緩；2010年起建案與基礎建設密集展開，熱島強度迅速上升並空間集中。統計分析驗證建蔽率與熱島強度之間具有穩定且顯著正相關，解釋力優於容積率，顯示其在熱通量累積中的關鍵角色。本研究建議將建蔽率作為熱壓管理核心指標，並輔以綠覆底線規劃與長期監測機制，以提升都市氣候調適力並實現新市鎮永續發展之目標。

Since its initial announcement in 1992, the Danhai New Town development has undergone several suspensions and restarts, making it a representative case for examining the impact of urbanization on the thermal environment. In recent years, with a sharp increase in core development density, both annual average temperatures and the frequency of extreme heat days have significantly risen, indicating the emergence of a distinct urban heat island (UHI) effect. According to the urban heat flux model proposed by Oke, anthropogenic heat—closely associated with land use intensity, construction activity, and energy consumption—exhibits controllable and spatially distributed characteristics. This study integrates Landsat satellite imagery, building coverage ratio (BCR), and floor area ratio (FAR) data to analyze the spatiotemporal variation of land surface temperature (LST), normalized difference vegetation index (NDVI), and UHI intensity from 2000 to 2024. The results reveal that during the 2005 development hiatus, vegetation cover rebounded and UHI intensity declined; however, since 2010, with the proliferation of construction and infrastructure, UHI effects intensified and became spatially concentrated. Statistical analysis confirms a consistent and significant positive correlation between BCR and UHI intensity, surpassing FAR in explanatory power and highlighting its critical role in heat flux accumulation. This study suggests using BCR as a core metric for thermal pressure management, complemented by minimum greening thresholds and long-term environmental monitoring to enhance urban climate resilience and achieve sustainable new town development.