卢兴超, 徐宗学, 周玉文. 基于容积法和水文模型法的海绵设施效能评估研究[J]. 北京师范大学学报(自然科学版). DOI: 10.12202/j.0476-0301.2024022
引用本文: 卢兴超, 徐宗学, 周玉文. 基于容积法和水文模型法的海绵设施效能评估研究[J]. 北京师范大学学报(自然科学版). DOI: 10.12202/j.0476-0301.2024022
LU Xingchao, XU Zongxue, ZHOU Yuwen. Assessment of sponge facilities by using volumetric method and hydrological model method[J]. Journal of Beijing Normal University(Natural Science). DOI: 10.12202/j.0476-0301.2024022
Citation: LU Xingchao, XU Zongxue, ZHOU Yuwen. Assessment of sponge facilities by using volumetric method and hydrological model method[J]. Journal of Beijing Normal University(Natural Science). DOI: 10.12202/j.0476-0301.2024022

基于容积法和水文模型法的海绵设施效能评估研究

Assessment of sponge facilities by using volumetric method and hydrological model method

  • 摘要: 为了提升海绵设施布设的科学性和合理性,充分发挥海绵设施的效能,提出了基于容积法和水文模型法的海绵设施效能评估方法.以迁安市某海绵型建筑小区为例,借助容积法量化海绵设计方案,利用水文模型设置海绵设施控制雨水的优选路径,分别选用2、5、10 a一遇不同重现期下的2 h设计降雨情景对海绵设施建设效能进行评估,结果表明:1)与排水口演算和不透水区演算模式相比较,透水区演算径流排放模式,更符合海绵城市建设理念;2)在2、5、10 a一遇设计降雨情景下,相对于布设前,海绵设施布设后场地雨水径流总量削减率分别为86.9%、82.4%、79.6%,径流峰值流量平均削减为94.57%、87.89%、86.45%,雨水管道中最大充满度超过80%的管道长度分别降低了86.55%、85.27%、64.48%;3)在10 a一遇设计降雨重现期下,溢流节点J31在海绵设施布设后,井内最高水位降低了1.332 m,且其他9个溢流风险节点其水位也明显降低.上述研究表明,在2 h低重现期设计降雨情景下,海绵设施对场地径流总量、峰值流量有很好的削减作用,对雨水管道排水压力有显著减轻作用,对节点溢流风险有很好的控制效果,为今后开展海绵城市源头减排设施的布设提供了有价值的参考.

     

    Abstract: In order to improve the scientificity and rationality of the layout for sponge facilities, and fully leverage the efficiency of sponge facilities , a method of sponge facilities assessment based on volume method and hydrological model method was proposed. The pilot area of spongy city in Qian’an City was selected as the study area, the sponge design scheme was quantified by volume method, the optimal path for sponge facilities to control rainwater was proposed by hydrological model. Furthermore, 2 hours design rainfall scenarios with different recurrence periods such as 2-year, 5-year and 10-year were selected to assess the construction efficiency of sponge facilities. The results showed : (1) Compared with the mode of “Outlet Routing” and “Impervious Area Routing”, the runoff discharge mode of “Pervious Area Routing” was more consistent with the concept that rainwater runoff on the site was preferentially absorbed and treated by sponge facilities in the construction of sponge city; (2) Under the 2-year, 5-year and 10-year design rainfall scenarios, compared with the case before the construction of sponge facilities, the total reduction rates of rainwater runoff after the construction were 86.90%, 82.40% and 79.60%, respectively, the average reduction rates of peak runoff were 94.57%, 87.89% and 86.45%, at the same time, the length of the stormwater pipeline with the maximum filling degree exceeding 80% decreased by 86.55%, 85.27% and 64.48%, respectively. (3) Under the recurrence period of the 10 years designed rainfall, the maximum water level in the well of the overflow node at node "J31" decreased by 1.332m after the construction of the sponge facility compared with the case before construction, and the other 9 overflow risk nodes also decreased significantly. Above results showed that under the design rainfall scenario of short duration and low recurrence period, sponge facilities had good reduction effect on the total runoff and peak discharge in the study area, a significant reduction effect on the drainage pressure of rainwater pipelines, and a good control effect on the overflow risk of nodes, which will provide useful reference for the future deployment of source emission reduction facilities in the construction of sponge cities.

     

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