In recent years, recreational waterbodies are increasingly favoured in urban areas. In spite of the growing concerns for maintaining the required bathing water quality, the impacts of stormwater drainage are still poorly controlled. In this context, this study originally develops an integrated urban catchment-pipes-lake monitoring and modelling approach to simulate the impacts of microbial quality from stormwater drainage on recreational water quality. The modelling system consists of three separated components: the urban catchment component, the 3D lake hydrodynamic component and the 3D lake water quality component. A series of processes are simulated in the model, such as rainfall-discharge, build-up, wash-off of Escherichia coli (E. coli) on urban surfaces, sewer flows, hydrothermal dynamics of lake water and transport and mortality of E. coli in the lake. This integrated model is tested for an urban catchment and its related recreational lake located in the Great Paris region. Continuous monitoring and samplings were performed at the stormwater drainage outlet and three different sites in the lake. Comparing the measured data with simulation results over 20 months, the modelling system can correctly represent the E. coli dynamics in the stormwater sewer systems and in the lake. Although uncertainties related to parameter values, pollution sources and E. coli mortality processes could be further discussed, the good performance of this modelling approach emphasizes a promising potential for urban bathing water quality management.

中文翻译：

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雨水排放的大肠杆菌对休闲水质的影响：城市集水区，管道和湖泊的综合监控和建模。

近年来，休闲水域在城市地区越来越受到青睐。尽管人们越来越关注保持所需的沐浴水质量，但雨水排放的影响仍未得到很好的控制。在此背景下，本研究最初开发了一种集成的城市集水管-湖泊-湖泊监测和建模方法，以模拟雨水排水产生的微生物质量对休闲水质的影响。建模系统包括三个独立的组件：城市集水区组件，3D湖泊水动力组件和3D湖泊水质组件。该模型模拟了一系列过程，例如降雨排放，堆积，城市表面大肠杆菌的冲洗，下水道流量，湖水的水热动力学以及大肠杆菌的运输和死亡率。湖中的大肠杆菌。该集成模型针对位于大巴黎地区的城市集水区及其相关的休闲湖进行了测试。在雨水排放口和湖中的三个不同地点进行了连续监测和取样。将测量的数据与20个月的模拟结果进行比较，该建模系统可以正确表示雨水排放系统和湖泊中的大肠杆菌动态。尽管可以进一步讨论与参数值，污染源和大肠杆菌死亡过程有关的不确定性，但是这种建模方法的良好性能强调了城市洗浴水质量管理的潜力。在雨水排放口和湖中的三个不同地点进行了连续监测和取样。将测量的数据与20个月的模拟结果进行比较，该建模系统可以正确表示雨水排放系统和湖泊中的大肠杆菌动态。尽管可以进一步讨论与参数值，污染源和大肠杆菌死亡过程有关的不确定性，但是这种建模方法的良好性能强调了城市洗浴用水质量管理的潜力。在雨水排放口和湖中的三个不同地点进行了连续监测和取样。将测量的数据与20个月的模拟结果进行比较，该建模系统可以正确表示雨水排放系统和湖泊中的大肠杆菌动态。尽管可以进一步讨论与参数值，污染源和大肠杆菌死亡过程有关的不确定性，但是这种建模方法的良好性能强调了城市洗浴用水质量管理的潜力。