圖書典藏及影音數位平台

近年極端水文事件發生頻率變高，現今規劃思維雖已考量以綜合治水策略，包括工程及非工程手段以達減洪、減災之目的，但在全球氣候環境變遷下，未來可能威脅恐仍將與日俱增。 為因應未來更艱鉅的挑戰，實有需要重新檢討現行防洪設計保護標準。本計畫擬探討國內外現行的防洪設計標準及彙整國內外相關研究資料，並結合各項相關綜合治水對策，進一步研擬出較具實用性、永續性且考量面向較廣的防洪設計保護標準，俾供未來治水防洪設計規劃之參考。

The study divides flood protecting standard into two categories, Flood Protecting Standard of Facilities (FPSF) and Flood Protecting Standard of Regions (FPSR). FPSF is used for hydraulic facilities design and used to ensure that channel capacity admitting storm flood under specific return period. FPSR is used for disaster reduction and used to ensure that hydraulic facilities draining regional flood immediately under specific return period. Based on relative literature reviews, the study proposes a quantity procedure to evaluate the FPSF and FPSR. The study suggests retaining the existing FPSF of different drainages but FPSF of downstream should check the feasibility that conjunction discharge must be less than or equal to FPSF of downstream. Five methods are proposed to decide the FPSR. One is proposed to decide FPSR of different watershed and four are proposed to decide FPSR of different land use. The estimation theories are based on hazard, vulnerability, risk, cost and benefit. The FPSR estimation result is the lowest standard should be satisfied. If there is any important facility or specific development area in protecting region, industry competent authority can raise its FPSR. Finally, three cases are used to demonstrate proposed quantity procedure.