YANGHai-yan,HUANGMing-yang,ZHOUGuang-yu,et al.Design of Flood Control and Drainage Planning Scheme for Coastal Mountainous Cities Based on Watershed[J].China Water & Wastewater,2023,39(5):133-138.
基于流域的沿海山地城市防洪排涝规划方案设计
- Title:
- Design of Flood Control and Drainage Planning Scheme for Coastal Mountainous Cities Based on Watershed
- Keywords:
- flood control and drainage planning; SWMM; coastal mountainous city; large-scale drainage system; runoff volume
- 摘要:
- 针对我国内涝灾害频发、防洪排涝规划思路缺乏系统性的现状，总结了从整体到局部3 个层次的防洪排涝体系，并运用SWMM模型分析了多种降雨-洪水-潮水遭遇情况下，X省S市Y区现状水系及防洪排涝规划方案的排水能力，验证了该体系的科学合理性。通过65 次模拟及方案调整，确定了Y区的最佳水系规模，并预留6 座泵站。结果表明，在20年一遇最不利24 h降雨遭遇50年一遇洪水及50年一遇潮水条件下，Y区共形成3 506×104 m3的径流量，其中2 402×104 m3的径流量通过水系排至外江外海，193×104 m3径流量通过泵站排至外江，911×104 m3径流量被河流、滞涝区消纳，Y区内涝风险得以消除。
- Abstract:
- In view of the frequent occurrence of waterlogging disasters and the lack of systematic planning for flood control and drainage in China, the three levels of flood control and drainage system from the whole to the local were summarized, the drainage capacity of Y district, S city, X province and its current drainage system and flood control and drainage planning scheme were analyzed under a variety of rain-flood-tide scenarios by using SWMM model, and the scientific rationality of the system was verified. Through 65 simulations and scheme adjustments, the optimal drainage scale of Y district was determined, and 6 pumping stations were reserved. When the most unfavorable 24-hour rainfall with 20-year return period encountered the 50-year return period flood and 50=year return period tide, the runoff with a total volume of 3 506×104 m3 was formed in Y district, of which the runoff with volume of 2 402×104 m3 was discharged to the outer river through the water system, the runoff with volume of 193×104 m3 was discharged to the outer river through the pumping station, and the runoff with volume of 911×104 m3 was absorbed by rivers and detention areas. Therefore, the risk of waterlogging in Y district was eliminated.
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