雨污水管混接及调蓄池对城市内涝的影响分析——以广州市某高校为例  

Impact analysis of illicit discharge and storage tank on urban waterlogging:Taking a university in Guangzhou as an example

作　　者：田甜 胡海英[1] 蒋乐欣 程香菊[1,2] 章宇达 TIAN Tian;HU Haiying;JIANG Lexin;CHENG Xiangju;ZHANG Yuda(School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510641,Guangdong,China;State Key Laboratory of Subtropical Building and Urban Science,South China University of Technology,Guangzhou 510640,Guangdong,China)

机构地区：[1]华南理工大学土木与交通学院,广州510641 [2]华南理工大学亚热带建筑与城市科学全国重点实验室,广州510640

出　　处：《给水排水》2024年第S1期381-388,共8页Water & Wastewater Engineering

基　　金：国家自然科学基金项目(52479064);广东省自然科学基金项目(2024A1515011047)

摘　　要：为探究雨污水管混接和天然调蓄空间密集区域内涝的影响,以广州市某高校积水严重区域为例,构建了一维管网与二维地表产汇流模块耦合的水文水动力模型,计算了工况一(现状)、工况二(改造混接雨污水管)、工况三(改造混接雨污水管+调蓄池)在降雨重现期2a、5a及10a下的易涝区积水情况和研究区排放口排水量。结果表明:工况三削减易涝区现状淹没总面积的效果优于工况二,在三种降雨重现期下淹没面积削减率分别提高了28.4%、37.7%和31.3%;P=5a和10a时,工况三在积水深度为0.15~0.3 m时对应的淹没面积发生陡降;对于同一重现期,研究区排放口排水量峰值和总排水量均呈现工况三最小、工况一居中、工况二最大的规律,与工况一相比,工况二排水量峰值增加了6.2%~14.8%、总排水量增加了10.6%~11.9%,增加了下游管网排水压力;工况三排水量峰值削减了24.3%~29.5%、总排水量削减了36.2%~39%的雨水,大大降低了下游管网排水压力。In order to explore the impact of illicit discharge and natural storage spaces on waterlogging in densely populated areas,taking the severely waterlogged area of a university in Guangzhou as an example,a hydrological and hydrodynamic model was constructed by coupling a one-dimensional pipeline network with a two-dimensional surface runoff module.The waterlogging situation in flood prone areas and the discharge volume at the study area discharge outlet were calculated for working conditions one(current situation),two(illicit discharge retrofitting),and three(illicit discharge retrofitting joint storage tanks)under rainfall return periods P=2a,5a,and 10a.The results show that condition three has a better effect on reducing the total submerged area in flood prone areas than condition two,and the reduction rates of submerged area have increased by 28.4%,37.7%,and 31.3%respectively under the three rainfall return periods.When P=5a and 10a,the submerged area corresponding to condition three experiences a sharp decrease at a depth of 0.15~0.3m of accumulated water.For the same return period,the peak and total drainage of the discharge outlet in the study area show the pattern of minimum in condition three,middle in condition one,and maximum in condition two.Compared with condition one,the peak drainage in condition two increased by 6.2%to 14.8%,and the total drainage increased by 10.6%to 11.9%,indicating that condition two increased the drainage pressure of the downstream pipeline network;The peak drainage volume of condition three was reduced by 24.3%to 29.5%,and the total drainage volume was reduced by 36.2%to 39%of rainwater,indicating that condition three greatly reduced the drainage pressure of the downstream pipeline network.

关 键 词：雨/污水管混接 调蓄池 城市内涝 水文水动力模型 

分 类 号：TU992[建筑科学—市政工程]