PUZheng-heng,CHENZheng-xia,YANGMeng-qi,et al.Empirical Study on Simulation and Assessment of Runoff Control Performance of Low Impact Development Facilities[J].China Water & Wastewater,2022,38(23):134-138.
低影响开发设施径流控制效果模拟评价实证研究
- Title:
- Empirical Study on Simulation and Assessment of Runoff Control Performance of Low Impact Development Facilities
- 关键词:
- 海绵城市; 低影响开发; MIKE URBAN; 径流控制效果评价
- 摘要:
- 以青岛市李沧区海绵城市试点区内某排水分区为研究对象，基于MIKE URBAN构建降雨径流模型，并与二维地表漫流模型耦合，进行低影响开发（LID）设施径流控制效果模拟评价的实证研究。采用6场实测降雨数据对模型参数进行率定和验证，纳什效率系数（NSE）均大于0.65，保证了模型的准确性。在重现期为1 年、5 年和10 年的设计降雨情景下模拟分析LID设施的径流控制效果和内涝控制效果。结果表明，当设计降雨重现期为1年时，LID设施对雨水径流总量和峰值的控制效果显著，可达到海绵城市建设目标，但随着降雨强度的增加，LID设施的控制比例降低，这印证了城市内涝控制需要灰绿耦合、系统解决。
- Abstract:
- To conduct an empirical study on the rainfall runoff control performance of low impact development (LID) facilities, the rainfall runoff model of a drainage area in the sponge city pilot area of Licang District, Qingdao was constructed based on MIKE URBAN and coupled with the two-dimensional surface overflow model. The model parameters were calibrated and validated by measured data of six rainfall events, and the Nash-Sutcliffe efficiency coefficient (NSE) was all greater than 0.65, indicating that the accuracy of the model was satisfying. The runoff control performance and waterlogging control performance of LID facilities were simulated and analyzed under the design rainfall scenarios with return periods of 1-year, 5-year and 10-year. Under the designed rainfall scenario with return period of 1-year, LID facilities had a significant control effect on the total runoff volume and peak flow, which reached the goal of sponge city construction. However, with the increase of rainfall intensity, the control rate of LID facilities decreased, which also confirmed that urban waterlogging control required to be coupled with gray and green systems.
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