Research Of 3D Flood Routing Simulation Based On Vega

Nowadays, 3D simulation technology of the Science of Computer Graphics has been promoted quite much, and large area 3D terrain simulation for real-time rendering has been coming true. Simulation technology is integrated with flood forecast and flood routing in the thesis. A flood routing simulation application is implemented, which forecast results based on some forecast models are displayed in 3D ways, and can provide strong support for anti-flood decision.Water, the most important object of the flood simulation, can be emulated in several different ways in computer graphics. Gerstner Waves, FFT model and Perlin Noise are introduced in the thesis, and FFT model is particularly analyzed. Research has been made to adapt the FFT model to computer's performance according to the conditions of valley flood including LOD, seamless stitching, cutting out and elevation varying. Some experiments have also been made to figure out the parameters of the model which are suitable for the simulation of valley flood.Besides the simulation of water, the method and data requirement of simulating the terrain of large areas are also introduced in the thesis. DTM is discussed, particularly, terrain multi-resolution representation is introduced.With all these theories, a project has been implemented based on Vega, 3D simulation software, to simulate the flood routing progress of the QingJiang River. The framework, design and functions of the project are described in details. Some problems that arose during the procedure of implementing are finally solved.A summarize for the work of the project is the final part of the thesis. Innovation and shortage are pointed out for later implementing of the project, prospect of simulation in the field of digital-drainage-area is also presented.