中文摘要：

我国是地震多发区,地震形成的堰塞坝一旦溃决,对下游城市和保护区将产生严重影响。由于堰塞坝溃决的复杂性和不可重复性,因此单一的数值模拟和物理模型试验均无法全面展现其变化特征。而三维视景模拟可在虚拟环境中精确地提供堰塞坝溃决及洪水演进的动态演变过程,具有显著的优势。本文重点阐述了堰塞坝溃决洪水三维视景模拟的基本原理和关键技术,基于堰塞坝溃决洪水计算模型和三维视景仿真技术之间的耦合,对堰塞坝溃决洪水进行三维分析和仿真,实现堰塞坝溃决洪水的三维视景模拟仿真与应用。相比传统的一维或者二维水动力学计算和展示,三维视景模拟更为准确和直观,它为堰塞坝溃决洪水问题的深入研究提供了一条行之有效的途径,可为提前制订应对方案和降低堰塞坝溃决所带来的损失提供参考依据。

英文摘要：

China is an earthquake prone area. Once the earthquake induced barrier dam outburst,it will cause a devastating effect on the downstream cities and protected areas. Because of the complexity and unrepeatable of the barrier dam,numerical simulation and physical model experiment can not fully show its characteristics. While,three dimension visual simulation can accurately provide the dynamic evolu tion process of the flood routing in the virtual environment and has significant advantages. This paper mainly expounded the key technologies of three dimension visual simulation on outburst flood of barrier. Based on the dam flood calculation model and the coupling between the three dimension visual simulation,three dimension analysis and simulation were carried out on the dam flood,and the three dimension visual simu lation of the dam flood simulation and application were implemented. Compared with the traditional one dimensional or two dimensional hy drodynamic calculation and display,three dimension visual simulation was more accurate and intuitive,which provided an effective approach for research outburst flood of barrier dam,and reference basis for early response and reducing the losses caused by barrier dam outburst.