基于管道流量监测数据的城市雨洪模型实用性研究

在总结过去多年管道流量监测经验教训的基础上,创新使用多声道多普勒流量计,成功获取了5min频次的雨水管网流量过程,提升了监测的稳定性和监测结果的可靠性,使得利用多场次资料进行城市内涝模型参数率定以及验证成为可能。选取城市典型区域,分别建立了MIKE、SWMM、InfoWorks一维管网模型,并按照有关规范要求,在对降雨资料和水位、流量资料进行科学分析后,利用经过筛选的有效数据进行模型的参数校核和率定,经过验证符合《内涝防治系统数学模型应用技术规程》要求。通过误差分析,率定后的模型,对典型区域的管网汇流模拟较好,在内涝分析预测预报中精度较高,其流量峰值预测值与实测值的误差在10%以内。

Practical Study of Urban Flood Model in Typical Area

On the basis of summing up the experience and lessons of monitoring pipeline flow over the past years, this paper applied the multi -channel supersonic Doppler flowmeter to successfuUy obtain the rainwater flow process with a 5min frequency, which has improved the monitoring stability and the reliability of monitoring results. This makes it possible to use multiple data to determine the parameters of the uii>an flood model and verify it. One dimensional models of MIKE, SWMM and InfoWoiics were built in typical urban areas. According to the relevant regulations, the parameters were checked and calibrated based on the scientific analysis of rainfall data, water level and flow data. And the verification results meet the requirements of the "Technical Regulations for the Application of Mathematical Model of Internal Flood Control System". Through the error analysis, the optimized model simulates better in pipeline flow, of which the accuracy is higher in the prediction of waterlogging analysis. The error between the simulated and the measured value is within 10%.