Development of evaluation approach for behaviors of health risk factors derived from combined sewer overflow

本研究旨在评估降雨后合流制污水溢流污染负荷对城市海岸带水质的影响。在此基础上，开发了以台场为代表的水环境优美区的健康风险评价技术。根据城市径流分析的各种结果，CSO的发生具有分类的降雨模式。预测E.大肠杆菌在台场地区的三维水质模型，其中考虑了潮汐效应和污染负荷的泵站和污水处理厂。

The objective of this study is to evaluate the effect of pollutant load derived from combined sewer overflow(CSO) on water quality in urban coastal area after rainfall event. Then, evaluation technique of health risk in water amenity area, such as Odaiba, was developed. Based on various results of urban runoff analysis, the CSO occurrence was characterized by categorized rainfall pattern. It is possible to predict the behavior of E. coli in Odaiba area by 3-dimentional water quality model in which the tidal effect and pollutant loads from pumping station and waste water treatment plant were considered.