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Semi-Explicit Modelling of Watersheds with Urban Drainage Systems

机译：城市排水系统流域的半显式建模

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AbstractIn rainfall-runoff modelling of urbanized and semi-urbanized watersheds, the urban drainage systems considerably influence runoff propagation time. In small scale watersheds, the drainage network may be modelled explicitly. In contrast, for larger watersheds, most hydrological models are based on a rough representation of the effects of drainage systems, thus failing to represent the rapidly-varying real flow dynamics.Therefore, a trade-off methodology has been developed to account for impervious surfaces and drainage effects accurately, without the need for modelling the entire drainage network in detail. Undrained impervious areas have been distinguished from drained ones. Rain falling on the former has been discharged as overland flow, whereas flow on the later has been routed separately using “virtual pipes”, which enable a simplified process-oriented modelling of the drainage network.The methodology has been applied to a 130 km2 Belgian catchment, resulting in the simulation of fast flow peak...
机译：摘要在城市化和半城市化流域的降雨径流模拟中，城市排水系统极大地影响了径流传播时间。在小规模流域中，排水网络可以明确建模。相比之下，对于较大的流域，大多数水文模型都是基于排水系统影响的粗略表述，因此无法表示快速变化的实际水流动力学，因此，开发了一种折衷方法来解决不透水面的问题。和排水效果准确，无需对整个排水网络进行详细建模。不排水的区域与排水的区域已被区分。前者的雨水作为陆上水流排出，而后者的水流则通过“虚拟管道”分别布线，从而简化了面向过程的排水管网建模。该方法已应用于130 km2的比利时人流域，从而模拟快速流量峰值...

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