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下凹式绿地作为一项低成本的低影响开发设施,不仅有良好的雨水渗蓄效果,还可减少径流污染,适合用于应对我国城市排水系统在近年愈加突出的问题.通过核算植物淹水时间对下凹式绿地溢流口高度的设计上限进行研究;通过分析暴雨情景,对下凹式绿地下凹深度的下限进行研究.研究结果表明:溢流口高度受土壤渗透率和植物耐淹时间影响;下凹深度主要受目标暴雨强度和溢流口雨水篦规格影响.
As a low-cost and low-impact development facility, sunken green space not only has good effect of rainwater seepage but also can reduce runoff pollution and is suitable for dealing with the increasingly prominent problems of urban drainage system in our country in recent years. Time to study the design upper limit of the height of the underflow green space overflow and study the lower limit of the concave depth of the concave green space by analyzing the rainstorm scenario.The results show that the height of the overflow is affected by soil permeability and plant flooding resistance Time effect; The depth of the depression is mainly affected by the target storm intensity and the grate size of the overflow grate.