地球的資源正在不斷地耗盡當中，而燃燒化石燃料所排放的二氧化碳加劇了地球的暖化，造成全球氣候變遷日益嚴重，因此對於都市中建築物能源使用效率的提升，也在近幾年開始愈來愈受到重視。特別是在熱帶和亞熱帶區域，強烈的太陽輻射更容易加劇建築物的熱負荷，使得該地區的空調使用成了最大的碳排放禍首之一。而建築物的屋頂，更是承受太陽輻射最直接、最大量的部分，因此屋頂結構隔熱效益好壞，便成為決定室內溫度高低的重要關鍵之一。本研究在探討容器式薄層綠化屋頂的各種隔熱效益與表現，並試圖設計一套節能省水的永續型薄層栽培容器。
本研究之薄層屋頂綠化實驗場位於地屬熱帶氣候的高雄市，在輔英科技大學校內一棟四層樓的建築物屋頂，進行長期的實驗觀察與資料收集。首先以栽培介質深度10cm的薄層綠化屋頂，針對四個不同的栽培介質、三種不同的灌溉頻率、以及四種不同類型的耐旱植物，執行為期四年的監測與資料分析，找出最佳隔熱效益的栽培介質、最適當的澆灌方式、以及生長最良好的植物。
接著針對挑選出來隔熱表現最佳的栽培介質—燒結污泥，進行不同窯燒溫度、不同配比以及不同粒徑的物理性質檢測，該六種物理性質為：總體密度、保水率、孔隙率、筒壓強度、pH值和導電度。接著從中挑選出最適當的組合，評估其隔熱效益，並以此作為工廠大量生產的最佳組合。
最後，設計一套兼具保水層和空氣流動層、輕便易搬運、能夠抗UV的永續型薄層栽培容器，並針對其隔熱效益加以評估。
薄層屋頂綠化無疑地為環境、經濟和美學提供了諸多好處。利用永續型容器進行薄層屋頂綠化，搭配高保水栽培介質與合適植栽，質輕易搬運，提供一般民眾簡單方便的薄層屋頂綠化模矩商品；尤其擔心滲漏問題的老舊建築，更可應用以改善屋頂隔熱問題，並可減緩暴雨逕流、降低屋頂滲漏風險。薄層屋頂綠化節能減碳，建議政府應儘快立法加以推廣。

The need for the better use of scarce planetary resources has never been more evident than it is today. However, this need is poorly reflected in human housing. In recent years, the realization of the importance of constructing human shelters that better conserve energy and water resources through appropriate insulation and architectural designs has been growing. Among the important advancements in these areas is the use of vegetated green roofs for both energy and water conservation. The present study investigates this topic within the specific climatic context of tropical regions. Long-term experimental results are provided from a four-floor building in Kaohsiung City, located in the southern part of Taiwan.
The current study involves an extensive, fully monitored green roof and examines four different growing substrates, three different irrigation regimes, and four different types of drought-enduring plants to determine the most efficient combination of these three factors in providing maximum heat insulation and water usage efficiency. The attenuation of solar radiation through the vegetation layer is evaluated, as well as the performance of the thermal insulation of the green roof structure. A study on one of the growing substrates, sintered sludge, was subsequently conducted to examine the six physical properties which are bulk density, water holding capacity, porosity, particle cylindrical crushing strength, pH, and electrical conductivity and to evaluate thermal performance.
Finally, an extensive green roof system, combined with planting containers that have water retention and air flow layers and sintered sludge as growing substrates, was designed. The thermal performance of this system was evaluated.
Extensive green roofs undoubtedly provide excellent benefits to the environment, economics, and aesthetics. Such systems will be among the significant solutions contributing to the retardation of climate change and to the conservation of materials, energy and water resources.

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