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Floods are brought to mankind in nature the worst kind of natural phenomenon, but it is also essential to maintain the ecological balance of nature ecological processes . Both domestic and foreign experts and scholars from all angles , various applications to further study how to use computer technology, virtual reality technology , geographic information system technology and other high-tech quickly and accurately predict and simulate flood the entire process. Therefore , in the past a simple flood routing must rise to the realm of flood simulation in order to better serve the research flood occurred at a time , place, intensity and scope to provide timely , accurate, image and intuitive forecasting tool. In this paper, Dongping , Shandong Province as the study area flood , flooded in the detailed analysis of the process , based on in-depth study of the network to create three-dimensional scene , three-dimensional scene shows the output of three-dimensional scene , three-dimensional simulation of the process as well as flood the realization of the key techniques and methods. In this study, two-dimensional unsteady flow mechanics theory, analysis of flood simulation theory, based on WebGIS technology, Skyline development platform and data streaming technology , Ajax web programming language for flood simulation of three-dimensional visualization of the results of research, build WebGIS-based three-dimensional visualization system flooded , both to meet the accuracy requirements of flood simulation , but also meets the network transmission fluid , timeliness , solve the network load and display three-dimensional scene is slow , taking up memory space is a big problem . The system development and use of proven : the WebGIS technology and 3D visualization technology, real-time simulation of flood inundation process to achieve flooded network 3D visualization and related flood analysis, flood modeling, flood management and decision-making a scientific basis and technical support , has important theoretical significance.
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