摘要
以北京市副中心某合流制小流域为研究对象,采用Mike Urban建立溢流水质和水量模型,进行初期雨水调蓄池容积计算。由于Mike Urban的地表径流模型对基础数据要求非常高,因此首先分析了研究区地表沉积物的特征,为地表径流模型提供详细的基础数据。分析发现,研究区地表沉积物静态累积量为110kg/hm^(2),累积速率5.5kg/(hm^(2)·d)。其中COD、NH_(3)-N、TN和TP的总含量分别为307.9g/L、25.7g/L、11.6g/L、0.8g/L。通过不同粒径沉积物的负荷比分析得到细粒径颗粒物和粗粒径颗粒物对COD、NH_(3)-N、TN、TP的贡献率分别为84%、83%、74%、33%和16%、17%、26%、67%。最后,为了使雨季排放的溢流污水满足该区域下游受纳水体的功能(Ⅴ类)要求,以地表Ⅴ类水规定的浓度限值为目标浓度进行初期雨水调蓄池容积计算。发现若要同时满足COD、TN、NH_(3)-N和TP的排放要求,所需的调蓄池容积为1711 m^(3),相当于7.8 mm的径流控制深度。
Mike Urban was used to establish an overflow water quality and water volume model to calculate the initial rainwater storage tank volume of a small combined watershed in the Beijing Sub-center.Mike Urban’s surface runoff model needs many basic data,for simulation.Hence,the characteristics of the surface sediments in the study area were analyzed here to provide detailed basic data for the surface runoff model.It was found that the static accumulation and the accumulation rate for surface sediment was 110kg/hm^(2)and 6kg/hm^(2)/d.The total content of COD,NH_(3)-N,TN and TP in the sediments were 307.9g/L,25.7 g/L,11.6 g/L,0.8 g/L,respectively.Through the analysis of the load of a grain size fraction,the contribution rates of fine particle and coarse particle to COD,NH_(3)-N,TN,and TP were 84%,83%,74%,33%and 16%,17%,26%,67%,respectively.Finally,in order to meet the functional requirements of the receiving water body,the initial rainwater storage tank volume calculation was carried out according to the concentration limit of for surface water of ClassⅤ.It was found that to meet the emission requirements of COD,NH_(3)-N,TN and TP at the same time,the required storage tank volume is 1711 m^(3),which is equivalent to the runoff control depth of 7.8mm.
作者
周邦磊
赵白航
李军
范飒
马春霖
ZHOU Banglei;ZHAO Baihang;LI Jun;FAN Sa;MA Chunlin(School of Civil and Engineering,Beijing University of Technology,Beijing 100124,China)
出处
《给水排水》
CSCD
北大核心
2021年第S01期482-489,共8页
Water & Wastewater Engineering
基金
“十三五”水体污染控制与治理科技重大专项(2017ZX07103)
国家水体污染控制与治理科技重大专项(2018ZX07701001-25)
关键词
合流制排水系统
水质模型
水量模型
地表沉积物特征
调蓄池
Combined drainage system
Water quality model
Water volume model
Surface sediment characteristics
Storage tanks
作者简介
通信作者:赵白航,女,1984年出生,江西九江人,博士,副教授。主要研究方向为污水处理与资源化。E-mail:bhzh@bjut.edu.cn
