摘要
为精准评估海绵设施内涝防控效能,探究海绵设施合理建设规模,增强城市街区雨洪风险管理能力,构建了SWMM降雨径流动态模型,并设计多重现期降雨情景和多水准管控情景,全面分析了海绵设施的雨洪风险防控效能。依据历史内涝灾害情况、内涝风险现状选定三个研究街区,选用绿色屋顶、透水铺装、雨水花园、植草沟作为雨水管控措施,对多水准情景的交叉模拟结果,从防控能力衰减指数及参量削减率两方面,类比分析降雨径流的控排关系,量化评估不同降雨重现期下各管控措施方案的雨洪风险防控效能。结果表明:(1)海绵设施管控方案具有控制街区内涝风险的作用,对低重现期降雨效果良好,但在面对高重现期降雨时存在管控缺口,需补充其他防治手段;(2)高布设率管控方案的雨洪防控效果提升并不大,针对各参量的防控能力衰减更多。
To accurately evaluate the prevention and control effectiveness of sponge facilities in water-logging management and to explore the reasonable construction scale of sponge facilities for enhancing urban block rainwater and flood risk management capabilities,a SWMM rainfall-runoff dynamic mod-el was constructed.Multiple return period rainfall scenarios and multi-level control scenarios were de-signed to comprehensively analyze the rainwater and flood risk prevention and control efficiency of sponge facilities.Three research blocks were selected based on historical waterlogging incidents and current waterlogging risk conditions.Green roofs,permeable pavements,rainwater gardens,and grassed swales were used as rainwater control measures.The cross-simulation results of multi-level scenarios were analyzed by comparing the control and drainage relationships of rainfall runoff in terms of control capability decay index and parameter reduction rate,quantifying the rainwater flood risk pre-vention and control effectiveness of each control measure scheme under different rainfall return peri-ods.The results indicate that:①Sponge facility management and control schemes effectively control the waterlogging risk in urban blocks,performing well under low return period rainfall but exhibiting control gaps under high return period rainfall,requiring additional preventive and control measures;②High deployment rate control schemes do not significantly improve the effectiveness of rainwater and flood control,with greater control capability decay for various parameters.
作者
董书畅
马东辉
张博骞
王娜
王威
DONG Shuchang;MA Donghui;ZHANG Boqian;WANG Na;WANG Wei(Department of Urban Construction,Beijing University of Technology,Beijing 100124,China;Center for Urban and Engineering Safety and Disaster Reduction,Beijing University of Technology,Beijing 100124,China)
出处
《防灾减灾工程学报》
CSCD
北大核心
2024年第4期762-771,808,共11页
Journal of Disaster Prevention and Mitigation Engineering
基金
国家自然科学基金项目(52278472)
北京市自然科学基金项目(8232004)资助。
关键词
效能评估
内涝风险
海绵设施
城市街区
efficiency evaluation
flood risk
sponge facilities
urban blocks
