土石围堰溃堰洪水三维动态风险分析系统建模研究

基于三维动态可视化仿真技术，耦合土石溃堰洪水数值模拟和溃堰动态仿真模型，建立施工洪水演进水力要素、洪水演进过程和河槽空间位置等信息耦合的土石溃堰洪水演进动态仿真架构，在三维可视化信息平台的基础上，将数值模拟数据及三维动态仿真数据与相应的图元对象建立映射关联，通过动态更新洪水水位、围堰及河道等图元变量和属性变量，直观的表现了土石溃堰洪水演进的时空分布特征，为探求溃堰发生发展机理及防洪减灾决策分析提供了交互式可视化平台。

Three-dimensional dynamic risk analysis modeling on earth rock cofferdam break flood

On the basis of three-dimensional dynamic simulation visualization, earth rock cofferdam break dynamic simulation model is established based on earth rock cofferdam break flood mathematical simulation and cofferdam break dynamic simulation model, earth rock cofferdam break flood propagating dynamic simulation framework has been achieved by coupling the flood propagating hydrodynamic factors, flood propagating processes and spatial location of river channel together. Based on the 3D visualization information platform, the mapping of numerical simulation data and 3D dynamic simulation data onto corresponding graphics primitive element is built. The characteristics on space-time distributed of cofferdam break flood propagating have been shown by dynamically updating the graphics primitive variable and property variable of flood, coffer dam and river channel etc. An interactive and visualized platform has been achieved for study on the principles of occurrence and development of cofferdam break flood and decision-making analysis on flood disaster control and mitigation.