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首页> 外文会议>European and Asian Junior Scientists Workshops; 20031108-11 and 20040207-10; Almograve(PT) and Malacca(MY) >Comparison between the performances of two combined sewer overflow devices in the reduction of water volume and pollutant discharges
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Comparison between the performances of two combined sewer overflow devices in the reduction of water volume and pollutant discharges

机译：两种组合式下水道溢流装置在减少水量和减少污染物排放方面的性能比较

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摘要

Storm water is a significant source of pollution in urban catchments, being the vehicle of both conventional pollutants and toxic substances. The growing attention towards environmental problems has consequently determined the necessity of adopting proper combined sewer overflow (CSO) devices able to reduce the pollutant load into receiving waters during rain events. In this paper, one of these devices - the high crested side-weirs with bottom orifice - is analysed. In particular a comparison, in terms of reduction of discharged water volumes and pollutants, between the performances of the high crested CSO device and the more common low crested side-weir is presented. For this purpose, numerical simulations have been run using experimental data concerning flow rates and pollutant concentrations measured during different rain events in the urban catchment of Cascina Scala, Italy. A model based on the solution of the fully-dynamic De Saint Venant equations for the water flow and of the advection-dispersion equation for the propagation of pollutants inside the sewer has been implemented and applied. The simulations show the better performances of the analysed high crested CSO device compared to the low crested side-weir.
机译：雨水是城市集水区的重要污染源，是传统污染物和有毒物质的媒介。因此，对环境问题的日益关注决定了采用适当的组合式下水道溢流（CSO）设备的必要性，该设备能够减少降雨事件期间进入接收水中的污染物负荷。在本文中，分析了其中一种设备-具有底部孔口的高顶侧栅-。特别是在减少排放水量和减少污染物方面，进行了高波峰CSO装置与更常见的低波峰侧堰之间性能的比较。为此，已经使用实验数据进行了数值模拟，这些数据涉及在意大利Cascina Scala城市集水区不同降雨事件期间测得的流量和污染物浓度。已实现并应用了基于全动态De Saint Venant方程的水流方程和对流扩散方程的污染物在下水道内部传播的模型。仿真结果表明，与低波峰旁堰相比，所分析的高波峰CSO装置具有更好的性能。

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