洪涝过程模拟及三维实景展示方法研究

Study on flood process simulation and 3D scene display method

针对变化环境下洪涝灾害频发以及洪涝模拟结果二维展示的自身局限性等问题,将高分辨率数值模型与三维可视化技术耦合,以陕西沣西新城、英国莫帕斯镇洪涝灾害过程为例,采用基于GPU加速技术的高分辨数值模型对城镇及江河洪涝灾害过程进行数值模拟,以较为准确获取洪灾淹没时间、淹没面积等信息;后处理展示方面实现数值模型与Unity 3D平台耦合,对洪涝过程模拟结果进行三维可视化展示,实现场景漫游等功能;应用快门式3D技术进行三维浏览,初步实现基于3D立体成像的洪水模拟展示。结果表明,计算结果与实测数据吻合度较高,积水面积平均相对误差分别为6.235%,1.505%,并真正实现了三维环境下的水灾害过程信息交互展示。可作为一种有效的协同平台来增强相关人员之间的沟通与协作,为决策人员提供准确有效的科学依据,在水利领域具有较好应用前景。

In view of the frequent occurrence of flood disasters in changing environments and the limitation of 2D display of flood simulation results,a high-resolution numerical model is coupled with 3D visualization technology.Taking the flooding process of Fengxi,Shaanxi Province and Morpeth,England as examples,it is simulated by the numerical model based on GPU,so as to obtain more accurate information of flood time and inundation area.The study realizes the coupling of the numerical model and the Unity 3D platform,3D visual display of flood process and preliminarily realizes the flood simulation based on 3D stereo imaging through the shutter 3D technology.The results show that the calculated results are in good agreement with the measured datas,the average relative errors of the accumulated water area are 6.235%and 1.505%,respectively,and the interactive display of water disaster process information in 3D environment is truly realized.It can be used as an effective collaborative platform to enhance the communication and collaboration between relevant personnel,and provide accurate and effective scientific basis for decision-makers,which has a good application prospect in the field of water resources.