Construction and Application of National Urban Waterlogging Risk Assessment System Based on Big Data

In recent years, frequent urban waterlogging disasters in China have seriously threatened people's life and property safety and social stability. In order to study and judge the comprehensive risk of urban waterlogging disasters in China, the emergency management department takes effective countermeasures in advance. Based on the experience of comprehensive assessment of urban waterlogging risk accumulated in the past ten years, the national waterlogging risk assessment system is constructed by using hydraulics theory, artificial intelligence identification and machine learning training technology. Based on the urban waterlogging classification carrying capacity, urban rainfall monitoring data and urban rainfall forecast data, supplemented by emergency command and dispatch related information, three major business modules are constructed: national waterlogging risk assessment, accurate risk analysis of urban waterlogging points, and rescue assistant decision-making. Combined with Internet big data, local emergency department report and video networking monitoring information, the regression verification and auxiliary judgment of system results are carried out. At present, the system has been applied in the emergency management tribe and integrated with multiple business systems. It continues to support the ministerial flood season briefing in the flood season of 2022 and 2023, and has practical application capabilities.