摘要
随着经济的发展,城市化进程的加快,城市洪涝问题日益严峻。以哈尔滨市远大生态园为例,利用SWMM模型模拟公园现状和加入不同LID措施(以透水铺装、渗渠和下凹式绿地为例)后场地的径流,根据模拟结果,选择合适的LID布局方案,并对远大生态园进行LID改造设计,为今后远大生态园的改造提出合理的LID使用建议。结果表明,加入不同的LID措施对雨洪控制的效果不同,铺设透水铺装、采用渗渠和下凹式绿地都可以改变径流系数,削减汇水区峰值流量,增加地表对降雨径流的滞蓄量和渗透量,将透水铺装和下凹式绿地结合使用比采用透水铺装和渗渠结合使用时峰流量削减的更多,径流系数减小的更大。而将透水铺装、渗渠和下凹式绿地三者结合使用在控制径流方面的发挥的作用最为明显。采用这些低影响开发措施对重现期为1a的降雨流量控制最为有效,3a和5a次之,重现期为10a的降雨效果最差,说明采用LID措施对小型降雨的滞蓄作用更明显。
With the development of national economy,the process of urbanization is speeding up, the problem of urban flood and waterlogging is becoming more and more serious. Taking the design of the reconstruction of Yuanda Ecological Park in Harbin, Heilongjiang Province as an example, the ideal of low impact development （LID） was introduced. According to current situation, the status quo of the garden was simulated by SWMM model,in which some LID measures were considered, such as the runoffs with permeable pavement,infiltration ditch,and and sunken lawn. Based on the simulation results,an appropriate LID layout plan was put forward,and a reconstruction design with the consideration of LID measures was con ducted to give suggestions for the reconstruction of the park. The results of the simulation indicated that different LID measures had different rain flood control effects： the applications of three LID measures could change the runoff coefficient,and cut catchment peak flow,increase of surface rainfall runoff storage capacity and infiltration. The combination of the permeable pavement and sunken lawn could control the runoff more efficiently than that of the permeable pavement and infiltration ditch. And these LID measures were mostly efficient for the control of rain flow with 1-year-recurrence interval, 3-and 5-year-recurrence interval were next to, and the worst for 10-year-recurrence interval, indicating that LID measures were more effective for small rainfall.
出处
《西北林学院学报》
CSCD
北大核心
2017年第4期294-298,共5页
Journal of Northwest Forestry University
基金
黑龙江省博士后科研基金项目(LBH-Q13024)
哈尔滨市创新人才项目(2013RFQXJ164)
