滨海城市合流制区域暗涵综合整治工程实例

An Example of Comprehensive Improvement Project for Culverts in Combined Sewer Areas of Coastal Cities

摘要:

针对滨海城市合流制区域污染控制与内涝防治割裂的问题，以海口市大同沟分洪渠治理工程为研究对象，探索协同治理路径，响应海南自贸港生态文明要求，破解旱季污水直排、雨季溢流和高潮位内涝等复合型水问题。工程以“污涝同治”为核心，构建“控污+防涝”体系，采用“源头分流—过程控制—末端兜底”策略，遵循 “应分尽分、截流为辅” 原则，实施泵站改造、暗涵整治、雨污分流、末端截流等措施，规划增设雨水强排设施。结果表明，这种工程措施可有效截流污水、削减入海污染物，缓解内涝风险，实现水环境与水安全同步提升，构建了协同精准治理模式，为同类滨海城市提供可复制范例，具有重要理论与工程价值。

Abstract:

Aiming at the issue of the disconnection between pollution control and waterlogging prevention in the combined sewer areas of coastal cities, taking the Haikou Datonggou Flood Separation Channel Governance Project as the research object, the paths for collaborative governance are explored. In response to the ecological civilization requirements of the Hainan Free Trade Port, the complex water issues such as direct sewage discharge during the dry season, overflow during the rainy season, and waterlogging at high tide levels are addressed. Centered on the concept of “co-treatment pollution and waterlogging”, a system of “sewage control + waterlogging prevention” is established for the project. A strategy of “source separation - process control - end-stage interception” is adopted. The principle of “maximizing separation and supplementing with interception” is adhered. The measures such as pumping station reconstruction, culvert regulation, separation of rainwater and sewage, and end-stage interception are implemented. The rainwater forced drainage facilities are planned to add. The results show that this engineering measure can effectively intercept sewage, reduce pollutants flowing into the sea and alleviate the risk of waterlogging. The simultaneous improvement is achieved in water environment and water security, and a collaborative and precise governance model is established. The replicable examples are provided for similar coastal cities with the significant theoretical and engineering value.