Water Resources and Power

As the pace of urbanization accelerates, urban waterlogging and traffic congestion have gradually become a focus issue. Therefore, the old town of the Jinshui District of Zhengzhou City, where the population is concentrated and urban waterlogging disasters frequently occur, was selected as the research object, and the urban waterlogging simulation model was constructed. Based on GIS spatial analysis, the accessibility of the urban road network and the emergency response capabilities of urban public service departments(Public Security, Medical Treatment, and Fire Protection) under the compound scenario of urban waterlogging and traffic congestion were evaluated. The results show that the accessibility of the road network in the “20210720” extreme rainfall scenario is poor. Under the 10-year rainfall, the emergency response capability of the Public Security is the highest, the emergency response capability of the Fire Protection is the lowest, and the evening peak has obvious impact on response ability. Under the “20210720” extreme rainfall, the emergency response capability of the Fire Protection is the highest, and the emergency response capability of the Public Security is the lowest.