生态沟渠对黄河流域城市雨水径流调控效果的研究  

Research on the effect of ecological ditches on the regulation and control of urban rainwater runoff in the Yellow River Basin

作　　者：杨利伟[1] 程舜媛 王岩松 白健豪 赵传靓 秦帅阳 YANG Liwei;CHENG Shunyuan;WANG Yansong;BAI Jianhao;ZHAO Chuanliang;QIN Shuaiyang(School of Civil Engineering,Chang′an University,Xi′an 710064,Shaanxi,China)

机构地区：[1]长安大学建筑工程学院,陕西西安710064

出　　处：《水利水电技术（中英文）》2022年第6期173-183,共11页Water Resources and Hydropower Engineering

基　　金：国际科技合作重点项目计划(2018YFE0103800)。

摘　　要：为探究生态沟渠对城市雨水径流量的调控效果及水质的净化作用,构建生态沟渠试验装置,研究不同重现期下生态沟渠对径流量的削减作用,以及不同径流污染物浓度下生态沟渠对径流污染物的去除作用。以黄河流域中段西安市未央区未央湖附近区域为研究对象,建立SWMM模型对生态沟渠建设前后的城市水文以及水质参数进行对比,分析其对城市水环境的影响。结果表明:生态沟渠在重现期为1 a、3 a、5 a的降雨条件下,径流量平均削减率依次为71.80%、51.67%、47.15%,污染物的去除效果在不同进水污染物浓度下变化幅度较大。模拟结果表明:在3种重现期条件下,构建生态沟渠后,雨水峰值流量均有所削减,对应的削减量依次为3.34 m^(3)/s、2.98 m^(3)/s、3.03 m^(3)/s;峰值时间分别延迟了3 min、3 min、5 min;降雨后期不同重现期的污染物负荷削减率由大到小依次为:1 a>3 a>5 a。研究结果能够为黄河流域城市规划中生态沟渠的建设提供数据支撑。In order to explore the regulation effect of ecological ditches on urban rainwater runoff and the purification effect of water quality,an experimental device of ecological ditches was constructed to study the reduction effect of ecological ditches on runoff in different return periods;and the runoff pollution under different concentrations of runoff pollutants removal of substances.Taking the area near Weiyang Lake in Weiyang District,Xi′an City,the middle part of the Yellow River Basin as the research object,a SWMM model was established to compare the urban hydrology and water quality parameters before and after the construction of ecological ditches,and analyze their impact on the urban water environment.The experimental results show that the average reduction rate of runoff in the ecological ditches is 71.80%,51.67%and 47.15%respectively under the rainfall conditions with the return period of 1 a,3 a and 5 a.The change in concentration is large.The simulation results show that:under the conditions of the 3 return periods,after the construction of the ecological ditches,the peak flow is reduced,and the corresponding reductions are 3.34 m^(3)/s,2.98 m^(3)/s,and 3.03 m^(3)/s;the peak time is delayed by 3 min,3 min and 5 min respectively;the order of pollutant load reduction rates for different return periods in the late rainfall period was 1 a>3 a>5 a.The research results provide data support for the construction of ecological ditches in the urban planning of the Yellow River Basin.

关 键 词：海绵城市 生态沟渠 径流量削减 径流污染物去除 SWMM模型 

分 类 号：TU992[建筑科学—市政工程]