Development of Distributed Storm Runoff Model for Populated Urban Catchment

开发并测试了东京风暴径流模型。这个基于城市集水区的模型的建立是基于所谓的城市景观GIS圈定，它忠实地详细描述了复杂的城市土地利用特征。单个空间元素之间的流动是基于已建立的水力和水文模型，其方程描述了城市环境中暴雨径流产生的各个方面。因此，该模型分别模拟了与河流溢流和下水道系统附加物相关的概念上不同的洪水过程。以日本东京都下江田集水区和上神田集水区为研究对象，建立了该模型并进行了评价。结果表明，该方法基于对城市集水区所有相关要素的详细再现，能够以高精度模拟城市洪水的各个方面。

The Tokyo Storm Runoff model is developed and tested. The set-up of this urban catchment-based model is based on so-called urban landscape GIS delineation that faithfully describes the complicated urban land use features in detail. The flow between single spatial elements is based on established hydraulic and hydrological models with equations that describe all aspects of storm runoff generation in an urban environment. The model thus simulates both the conceptually different flooding processes related to overflow from a river and surcharge from a sewer system, respectively. The model was set up and evaluated for the lower Ekota catchment and the upper Kanda catchment in Tokyo Metropolis, Japan. the results show that the suggested approach, based on a detailed reproduction of all relevant elements in an urban catchment, is able to simulate all aspects of urban flooding with high accuracy.