─總計畫：循環型社會之策略研究(Ⅱ)

本計畫研究範圍以台北地區水資源作為研究主題，以物質流方法進行調查、 分析與研究，探討水資源之質、量在大台北地區的進出與循環狀況。 工業生態學中之物質流分析，是提供產品和物質從人類經濟活動到環境之中 流動過程資訊的分析工具，這些資訊可被用來開發更全面的物質管理策略，以有 效減低物質的使用量。物質流分析建構了國家（區域）物質代謝過程，使得決策 者可系統性了解物質於國家（區域）製造、運輸、消費與廢棄情況，並藉以描述 特定物質在特定區域內之傳輸，從物質的生成階段立即加以監測與追蹤，得知其 廢棄至環境中或出口至其他地方之影響。因此，本研究以大台北地區自來水水資 源為主題，探討三項課題，包括：南北勢溪對大台北區域供水現況、漏水現況調 查及改善方案探討分析、以臺大校園為例探討區域性自來水物質流。 本研究完成新店溪流量、進水量（取水量與淨水量）、送水及配水、用水統 計等資料收集與彙整後，整理繪製大台北地區供水結構圖。由圖示及研究結果， 最大用水用戶為家庭用水台北自來水事業處、台灣省自來水公司第一區及第十二 區管理處;供水系統中最大的損耗為無費水量，又從自水量產銷分析得知無費用 水損失的主要型式為漏水量，而其中給水管線漏水的情形又最為嚴重。在臺大校 園的自來水物質流方面，93年自來水使用總消耗約202萬噸，倘以用水效率而言， 校園內之供水效率僅有76.7%，尚有許多可以改善的空間。This study was undertaken to investigate the material flexes of water resource by using the Material Flex Analysis (MFA) in the Taipei metropolitan area. This research revealed the subjects included the water supply system in Nan-Shih and Bei-Shih River, investigation of water leakage and the MFA of tap water in the campus of National Taiwan University. The results showed that the amounts of water supply to the Taipei metropolitan area was 945,933,191 M3 from the Nan-shih and Bei-shih River in 2003. The users were the Taipei Water District of Taipei city, the 1st area (northern Taipei County and Keelung City) and the 12th area (southern Taipei County) of Taiwan Water Corporation. The finding indicated that the unaccounted-for water was serious problem in the water supply system of the Taipei metropolitan area. The water leakage caused high unaccounted-for water and the mainly reason due to the damage of the water pipelines, especially the PVC pipes. In addition, the amounts of water usage were 2,019,520 M3 in the National Taiwan University in 2004. The problem of water leakage was still serious and the efficiency of water usage was 76.7%