基于水力模型的城市排水干渠排涝流量计算方法

发布时间：2018-05-03 14:44

本文选题：水力模型 + 排水干渠　；参考：《中国给水排水》2016年13期

【摘要】：针对城市排水干渠既承接上游山区洪水,又沿途接纳城市雨水管道涝水的特性,以湖北省黄石市某排水干渠为例,提出了城市干渠排涝流量计算模型。模型将城市干渠汇水区域划分为山地子排区和城市子排区,在子排区层面分别利用单位线法(山区)和MIKE SWMM模型(城区)建立暴雨径流模型,然后在共同的排水通道(城市干渠)层面建立了MIKE11水动力学模型。该模型既考虑了山洪以沟渠为主要排水方式的特点,又考虑了城区涝水以雨水管网为主要排水方式的特点,同时可以模拟排水干渠下游受顶托的情况。相对于传统的单位线法,水力模型法计算的径流总量大、峰值流量小、峰现时间早。该研究可为城市排水干渠排涝流量计算方法的选择及其合理取值提供参考。
[Abstract]:In view of the characteristics that the urban drainage trunk canal not only receives the flood in the upstream mountainous area but also accepts the flood water of the urban Rain Water pipeline along the way, a model for calculating the drainage discharge of the urban trunk canal is put forward by taking a drainage trunk canal in Huangshi City, Hubei Province as an example. The model divides the catchment area of urban trunk canal into mountainous sub-drainage area and urban sub-drainage area, and establishes rainstorm runoff model by using unit line method (mountainous area) and MIKE SWMM model (urban area), respectively. Then the MIKE11 hydrodynamic model is established at the level of common drainage channel (urban trunk canal). The model not only considers the characteristics of mountain torrents as the main drainage mode, but also takes the rainwater pipe net as the main drainage mode. At the same time, it can simulate the situation that the main drainage channel is supported by roof. Compared with the traditional unit line method, the total amount of runoff calculated by hydraulic model method is large, the peak discharge is small, and the peak time is early. This study can be used as a reference for the selection of calculation methods and reasonable values of drainage discharge in urban trunk drainage channels.
【作者单位】：湖北省城市规划设计研究院;武汉大学水资源与水电工程科学国家重点实验室;长江水利委员会长江科学院;
【基金】：中央高校基本科研业务费专项资助项目(2042014kf0257) “十二五”国家科技支撑计划项目(2012BAD08B03) 国家自然科学基金青年科学基金资助项目(51509010)
【分类号】：TU992

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