排水模型在海绵城市建设效果评估中的应用

Study on the Application of Drainage Model in Sponge City Reconstruction Evaluation

海绵城市建设是一种新型的城市建设模式,以某市海绵城市建设试点区为研究区域,根据区域基础物探数据和其他相关信息,建立综合排水系统模型,实现水文水力及相关水质指标的模拟。为保证模型准确性,基于已获取监测数据对模型进行相关参数的率定和验证,在纳什效率系数均大于0.5的前提下,对区域径流控制水平和面源污染控制水平进行模拟评估。结果显示,径流控制方面,年径流总量控制率模拟结果为79%;面源污染控制方面,污染物SS负荷总量削减率模拟结果为80%。因此,该市海绵城市的建设效果能够满足规划要求。

The construction of sponge city is a new type of urban construction mode. This study takes the sponge city construction pilot area of a certain city as the study area. Based on the regional basic geophysical data and other relevant information, a comprehensive drainage system model is established to achieve simulation of hydrological and hydraulic and the relevant water quality indicators. To ensure the accuracy of the model, the relevant parameters of the model were calibrated and validated based on the obtained monitoring data. Under the premise that the Nash efficiency coefficients are both greater than 0.5, the regional runoff control level and non-point source pollution control level were simulated and evaluated. The results show that in terms of runoff control, the simulation result of the total annual runoff control rate is 79%;In terms of non-point source pollution control, the simulation result of the total reduction rate of pollutant SS load is 80%. Therefore, the construction effect of sponge city can meet the planning requirements.