Abstract: In order to enhance the real-time capability of flood risk analysis and adapt to the dynamic characteristics of flood evolution, a 3D real-time flood risk analysis system based on the B/S architec⁃ ture has been designed. This system employs a coupled approach of the breach flow calculation software BREACH and the 2D hydrodynamic numerical model for dam-break flood calculation and simulation. It integrates WebSocket technology for real-time data transmission and utilizes Cesium 3D visualization platform to display the flood evolution. The core functional modules of this system are scenario manage⁃ ment, real-time calculation and calculation result analysis of dam-break flood, which can support dy⁃ namic management, real-time calculation and result visualization of the dam-break process. The system was validated through the case study of a reservoir. The results showed that the system can effectively re⁃ flect the flood inundation process, obtain reasonable calculation results, and enhance the intuitiveness of flood risk analysis and the decision-support capability through visualization technology

Key words: dam breach, flood analysis system, visualization, system development

摘要： 为提高溃坝洪水风险分析的实时性并适应洪水演进的动态特征，设计了一种基于B/S架构的三维实时洪 水风险分析系统。该系统采用BREACH溃口流量计算软件与二维水动力数值模型耦合的方法进行溃口洪水计算 及洪水演进模拟，并结合WebSocket技术实现数据的实时传输，利用Cesium三维可视化平台展示洪水演进过程。 系统核心功能模块包括溃坝洪水方案管理、实时计算及计算结果分析，可支持溃坝过程的动态管理、实时计算和 结果展示。通过某水库案例对系统进行了应用验证，结果表明，该系统可有效反映洪水淹没过程，计算结果合理， 并能够通过可视化技术提高洪水风险分析的直观性和决策支持能力。

关键词: 溃坝, 洪水分析系统, 可视化, 系统开发