本研究以「桃園市龍山滯洪池」為案例，探討都市防洪設施轉型為多功能永續空間的設計準則與效益評估。研究核心成果在於建立了一套兼具防洪、生態與社會效益的評估指標，並量化驗證其成效。 研究發現，透過創新的雙層滯洪結構與全國最大量體的雨水積磚系統，本案例達成以下核心成果： 一、 防洪效益量化：有效削減洪峰流量達 14 CMS，使周邊淹水面積減少 69%，顯著提升都市韌性。 二、 永續與生態指標：成本效益比（B/C ratio）達 2.5，公園綠覆率提升至 88% 以上，並透過雨水回收系統實現水資源循環利用。 三、 管理機制創新：提出結合 IoT 監測與 AI 預警的智慧管理模式，並建立包含「針孔探測」與「地下工殿清淤」的標準作業程序（SOP），有效解決傳統滯洪池維護難題。 本研究總結之設計準則與效益指標，可作為未來都市公共設施多目標開發之參考典範，落實海綿城市與 SDGs 永續發展目標。 關鍵詞：滯洪池公園、永續發展、效益評估指標、龍山滯洪池、雨水積磚、清淤 SOP;This study establishes design guidelines and benefit assessment indicators for transforming urban flood control facilities into multifunctional sustainable spaces， using the Longshan Detention Pond in Taoyuan as a case study. The core research findings demonstrate that the innovative dual-layer structure and extensive rainwater storage block system achieve significant quantitative results: 1. Quantified Flood Control: Reduced peak flow by 14 CMS and decreased flooding area by 69%， substantially enhancing urban resilience. 2. Sustainability and Ecological Metrics: Achieved a Benefit-Cost (B/C) ratio of 2.5 and increased green coverage to over 88%， while implementing a rainwater harvesting system for resource circularity. 3. Management Innovation: Developed a smart management model integrating IoT and AI， alongside a specialized Maintenance SOP (including pinhole detection and underground silt removal)， addressing long-term maintenance challenges. The proposed assessment framework and design criteria serve as a benchmark for multi-objective urban infrastructure development， aligning with Sponge City concepts and UN Sustainable Development Goals (SDGs).
