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海绵化改造小区调蓄池优化布局及其雨水径流控制效果——以浙江省嘉兴市烟波苑小区为例
陈前虎1, 周明1, 邹澄昊1, 张泸少1, 王贤萍2
1.浙江工业大学 设计与建筑学院, 浙江 杭州 310023;2.嘉兴规划设计研究院, 浙江 嘉兴 314000
摘要:
[目的] 在海绵城市建设背景下,从建筑小区尺度探究调蓄池布局对雨水径流的控制和利用,为平原河网区域城市旧城海绵化改造,增强排水防涝能力,提高雨水利用效率提供技术依据。[方法] 以浙江省嘉兴市典型老旧小区烟波苑海绵化改造工程为例,基于暴雨管理模型(SWMM)软件建立排水系统数学模型,通过分析研究区不同降雨重现期和积水节点之间关系,探究最佳的积水节点控制数目;在此基础上,输入设计雨水控制条件探索调蓄池合理布局方案。[结果] ①在5~15 a重现期内,研究区积水节点数量分布出现稳定期,并于9 a重现期时积水节点控制数量达到最佳;②模拟容积在20~100 m3之间的调蓄池比例达84%,达到实际建设标准;③采用合适的“低影响开发(LID)+调蓄池”方案后,研究区雨水径流控制效果提升明显,其中径流峰值削减率达40%以上,外排径流系数降低0.2左右,杂用水供给率最高可达146.3%。[结论] 老旧城区在进行海绵化改造时,应当重视调蓄池的合理布局与利用,以构建灰绿结合的径流控制系统,实现高效的雨水管理。
关键词:  调蓄池  雨水径流控制  建筑小区  海绵城市
DOI:10.13961/j.cnki.stbctb.2020.03.034
分类号:TU984;TU992
基金项目:国家重大社科基金项目“海绵城市建设的风险评估与管理机制研究”(16ZDA018)
Optimizing Layout of Storage Pool in Sponging-transformation Estate and Its Effects on Runoff Control of Rain Water -Taking Yanboyuan Estate of Jiaxing City, Zhejiang Province as an Example
Chen Qianhu1, Zhou Ming1, Zou Chenghao1, Zhang Lushao1, Wang Xianping2
1.College of Design and Architecture, Zhejiang University of Technology, Hangzhou, Zhejiang 310023, China;2.Jiaxing Planning and Design Research Institute, Jiaxing, Zhejiang 314000, China
Abstract:
[Objective] Under the background of sponge city construction, building estates were studied to explore the control and utilization of the layout of a storage pool for rainwater runoff. The purpose was to provide technical guidance for the reconstruction of the old city sponge in the plain river network area, enhance the drainage and waterlogging prevention capacity, and improve the efficiency of rainwater utilization.[Methods] Taking the typical old estate of the Yanboyuan sponge reconstruction project in Jiaxing City as a case, a mathematical model of the drainage system was established based on storm water management model software. The optimal control water node was calculated by analyzing the relationship between the different rainfall recurrence periods and the water accumulation node in the study area. On this basis, the design rainwater control conditions were inputted, and the reasonable layout of the storage pool was explored.[Results] ① During the 5-15 years recurrence period, the distribution of the number of ponding nodes in the study area appeared to be in a stable period, and it reached the optimal level in the 9 years recurrence period. ② The ratio of the simulated volume to the storage pool between 20 and 100 m3 was 84%, and it had practical construction value. ③ After the suitable "low impact development plus storage pool" scheme was adopted, the effect of runoff control in the study area was evidently improved. The runoff peak reduction rate was more than 40%, and the coefficient of outflow runoff decreased by approximately 0.2. The miscellaneous water supply ratio was as much as 146.3%.[Conclusion] In the old urban areas in sponge transformation construction, we should pay attention to the rational layout and utilization of the storage pool to construct the runoff control system, combined with gray infrastructure and forestation, to attain efficient rainwater management.
Key words:  storage pool  rain water runoff control  building estate  sponge city