基于SWMM模型与NSGA-Ⅱ多目标优化的LID布局研究
Research on LID layout of old community based on SWMM model and NSGA-Ⅱ multi-objective optimization
刘富勤 1刘欣然 1吴京戎2
作者信息
- 1. 湖北工业大学 土木建筑与环境学院,湖北 武汉 430070
- 2. 湖北工业大学工程技术学院,湖北 武汉 430068
- 折叠
摘要
科学的海绵城市设计方案能够在一定程度上缓解由极端暴雨引发的城市内涝.以北京市海淀区老旧小区为研究对象,将雨洪管理模型(SWMM)与非支配排序遗传算法(NSGA-Ⅱ)相结合,以建设成本费用、总径流削减率以及节点超载时间为优化目标,以各项低影响开发措施(LID)按比例布置的最大面积为约束条件,迭代筛选出Pareto最优曲线,通过分析不同LID措施组合在老旧小区中的雨水排放效率,提出有效的规划建议.研究结果表明:对于单项LID的布置方案,同比例下透水铺装的径流控制效果优于绿色屋顶;LID组合的径流控制效果与建设成本呈正相关,但总径流削减率增长幅度有限,高成本的建设方案并不能达到更优的削减效果,节点超载时间不会持续下降;降雨重现期为10a时(P =10),该小区LID布局最佳组合为37.12%绿色屋顶+17.7%下沉式绿地+7 组雨水罐+9.47%透水铺装.在强降雨条件下耦合SWMM与NSGA-Ⅱ智能算法的多目标优化模型能够为类似社区LID布局设计提供参考.
Abstract
Sponge city design scheme can alleviate urban flooding triggered by extreme rainstorms to a certain extent.Taking an old community in Haidian District of Beijing as a research object,the rainwater management model(SWMM)was combined with the non-dominated sorting genetic algorithm(NSGA-Ⅱ).With the optimization objectives of construction cost,runoff reduction effect,and node overload time,and the maximum area of each low impact development(LID)measure arranged proportionally as the constraint condition,the Pareto optimal curve was iteratively selected.By analyzing the rainwater discharge efficiency of differ-ent LID measure combinations in old residential areas,effective planning suggestions were proposed.The results showed that for a single LID layout scheme,the runoff control effect of permeable paving under the same proportion was better than that of green roof.The runoff control effect of LID combinations was positively correlated with the construction cost,but the growth of the runoff reduction rate was limited,and the high-cost construction scheme did not achieve a better reduction effect,and the node overload time will not continue to decline.When the rainfall recurrence period was 10a,the optimal combination of LID layout for the com-munity was 37.12％green roof +17.7％sunken green space +7 sets of rainwater tanks +9.47％permeable paving.The multi-objective optimization model coupling SWMM and NSGA-Ⅱ intelligent algorithm under heavy rainfall conditions can provide a reference for the design of LID layout in similar communities.
关键词
LID布局/SWMM/NSGA-Ⅱ/多目标优化/老旧小区/海绵城市Key words
LID layout/SWMM/NSGA-Ⅱ/multi-objective optimization/old community/sponge city引用本文复制引用
基金项目
国家自然科学基金(42101375)
湖北省建设科技项目(湖北省住建厅厅头20212075号)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据