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