ROOF GARDENS IN HOPE OF REDUCING URBAN HEAT EFFECT|城市打造屋頂農場 盼減緩熱島效應

Autumn is coming, and temperatures are dropping slightly. However, the Central Weather Bureau estimates that this autumn will be warmer. Due to concrete buildings and traffic, the urban heat island effect has influenced the environment. Building green roofs might be one way to help solve the problem and be more environmentally-friendly. This farmer isn't working in an orchard. He is taking care of his plants on the roof garden. ==HUANG GU-JHONG, Huxing garden director== The director told us that's sweet potato leaves and turmeric. Here we have chives, and the corn is almost ready to harvest. Last year, Taipei City launched a "Garden Cities Program", with model public roof gardens in each administrative district. ==HUANG GU-JHONG, Huxing garden director== It's a shame if we don't use the roof well Don't you think that's a good idea to plant and eat some organic, fresh vegetables from this place? Urban roof areas in Taiwan are often fully covered by corrugated iron sheets, and this type of roofing can reach up to 50-60 degrees Celsius during the summer. Kaohsiung's Cianjin Junior High school, set up a roof garden, combining techniques such as photovoltaic cell and aquaponics to turn the unused space into a multifunctional classroom. ==LAN LIANG-WUN, Gardening businessman== We have to consider the weight-bearing capacity carefully, that's why we used light soil or drainage boards to build our roof garden. The weight bearing capability, heat-resistance and water storage are all key factors to designing green rooves, for example, this building collected up to 100 tonnes of water over just 10 square feet area. ==LIAO CHAO-HSIEN, Professor, Dept. Harbor River Engineering, NTOU== The rainwater supply was 67 % of the daily need for watering for 30 minutes a day. The other 33% was from running water As extreme weather incidents become more normal, learning how to mitigate the effects of urbanisation is of vital importance. TRANSLATED BY：MERVYN KWAN 進入秋天，溫度也稍微下降了，不過氣象局預估今年秋天，天氣仍然偏向暖和，全台各地建築密集加上車輛又多，要降低熱島效應，改變現況，也許可以從頂樓種菜開始。 早上八點不到，這名農夫並沒有在田裡耕種，反而爬上屋頂，檢查農作物。 ==湖興空中農場場長 黃谷忠== 園長邊走邊解說 地瓜葉 這邊是薑黃 那邊有一些韭菜 這個是已經快要成熟的玉蜀黍 台北市從去年開始推動田園城市計畫，先從各個行政區的公有屋頂做示範，打造屋頂農場。 ==湖興空中農場場長 黃谷忠== 公有屋頂你沒有利用實在是很浪費 大家來吃一些有機蔬菜 ，無毒， 的蔬菜不是非常好嗎? 從空中俯瞰，台灣都會區的屋頂幾乎都被滿滿的鐵皮覆蓋，夏天屋頂溫度更可高達五六十度以上，高雄前金國中為了推動校園節能減碳，結合了太陽光電、魚菜共生等設施，在屋頂建置農園，讓原本閒置的屋頂，現在成了有多重功能的空中教室。 ==園藝業者 藍梁文== 我們就必須很慎重考量，荷重的問題。所以說我們做綠屋頂的時候，會用輕量的土，會用排水板這類的，必須讓它快速排水。 綠屋頂的設計，除了要考量到負重能力 和植物的耐熱性， 還必須能夠有效地蓄水，循環灌溉像海洋大學河海工程系 這棟建築物 本身就是巨型雨水蒐集體，只用面積10平方公尺的薄層綠屋頂就 可以貯存100噸以上的雨水 ==海洋大學 河海工程系 廖朝軒 教授== 每天灌溉一次以30分鐘來看 雨水的供給率可以到67%左右 灌溉用水67%來自於雨水 33%來自於自來水 面對反常氣候，熱浪挾帶豪雨變成了常態現象， 打造低耗能又能夠散熱的綠屋頂，不但是為了悠閒或美觀， 更是城市與大自然共存的必要改變。 記者 綜合報導