大兴机场海绵设施雨洪控制效果模拟  

Simulation of stormwater control effect of sponge facilities in Daxing Airport

作　　者：赵莹[1,2] 刘家宏 梅超[2,3] 骆卓然 董莉榕[1,2] ZHAO Ying;LIU Jiahong;MEI Chao;LUO Zhuoran;DONG Lirong(Faculty of Architecture,Civil and Transportation Engineering,Beijing University of Technology,Beijing 100124,China;State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Key Laboratory of River Basin Digital Twinning of Ministry of Water Resources,Beijing 100038,China)

机构地区：[1]北京工业大学城市建设学部,北京100124 [2]中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京100038 [3]水利部数字孪生流域重点实验室(筹),北京100038

出　　处：《南水北调与水利科技（中英文）》2023年第3期512-521,共10页South-to-North Water Transfers and Water Science & Technology

基　　金：国家自然科学基金项目(51739011,52009139);国家重点研发计划项目(2022YFC3090600)。

摘　　要：以大兴机场海绵系统为例,根据降雨径流资料,建立暴雨雨水管理模型(storm water management model,SWMM),模拟不同海绵设施组合情景下的水文过程。结果表明:在不同设计暴雨条件下,绿色基础设施、景观湖以及组合方案均能削减洪峰流量、延迟洪峰时刻;组合方案的雨水控制效果最为显著,5 a重现期下,出口处洪峰流量削减率和雨水总量控制率分别达41.5%和79.9%;景观湖的蓄滞作用在不同的重现期下对出口流量的影响时段不同,景观湖在低重现期下蓄积降雨过程中的雨水,削减降雨初期外排出口的流量,而在高重现期下蓄积空间主要用于降雨后期的雨水汇流的收集,在出口段明渠退水过程中减少外排雨水;绿色基础设施在上游区域的溢流量削减率达到10.6%,在洪峰削减、延迟峰值时刻上表现明显;上游连接景观湖后造成的回流会导致退水时长增加,在高重现期下回流雨水占用明渠蓄水空间,可能增加上游管网的溢流风险。Urban floods have become more and more frequent in a changing environment.Continue climate change and rapid urbanization pose great challenges to traditional stormwater management systems,resulting in frequent flooding in urban areas.Traditional flood control mainly relies on traditional gray infrastructure,because the burden of drainage increases,the method of simply increasing gray infrastructure is not sustainable for stormwater management.As an alternative to traditional gray infrastructure,Green Infrastructure is applied to alleviate urban flood.The sponge system of Daxing Airport is taken as an example.A storm water management model was established to simulate the hydrological process under different combinations of sponge facilities,on the basis of rainfall-runoff data,and the historical rainfall and flood flow data were used for calibration and verification.The different return period of design rainfall(5 a,10 a,50 a),according to the current construction situation,three kinds of sponge facilities laid schemes were designed,and compared with the simulation results without any sponge facilities,and the impacts of sponge facilities on flood peak flow,overflow volume were analyzed.The result can provide scientific and technical support for flood control and disaster reduction in the study area.The simulation results indicate:(1)Under different design rainstorm events,Green Infrastructure,landscape lakes,and combined solutions could reduce peak flow and delay peak times of the hydrograph.The rainwater control effect of the combined scheme is the most significant,comparing to the separate solutions.Under the 5-year return period,the reduction rate of the flood peak flow at the outlet and the control rate of the total rainwater amounted to 41.5%and 79.9%,respectively;(2)The storage and stagnation effect of the landscape lake was analyzed under different return periods.The landscape lake accumulates the rainwater during the rainfall under the low return period,reducing the flow of the outlet at the early stage o

关 键 词：海绵城市 大兴机场 绿色基础设施 雨洪控制 

分 类 号：TV13.9[水利工程—水力学及河流动力学]