| 虚拟流域环境中河道演变的整体自动 建模及可视化分析 |
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| 引用本文： | 冶运涛,蒋云钟,梁犁丽,王浩.虚拟流域环境中河道演变的整体自动 建模及可视化分析[J].水科学进展,2012,23(2):170-178. |
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| 作者姓名： | 冶运涛 蒋云钟 梁犁丽 王浩 |
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| 作者单位： | 中国水利水电科学研究院流域水循环模拟与调控国家重点实验室, 北京 100038 |
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| 基金项目： | 水利部公益性行业专项经费资助项目(200901031;201101026)~~ |
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| 摘 要： | 将三维虚拟仿真技术和科学计算可视化技术相结合应用于河道泥沙冲淤分布规律分析中,提出了基于虚拟现实技术的泥沙冲淤过程三维可视化技术框架并构建了相应系统。提出并研究了河道边界自动识别、河道演变过程数据模型的自适应生成、动态河道与大范围场景的无缝嵌套建模、多层细节层次与无缝拼接、时空过程可视化与控制显示模式、动态河道的交互、基于局部插值的断面提取等系统中使用的关键技术。以三峡坝区河道为例,研发了三峡坝区河道演变时空过程可视化表达系统,证明了提出方法的实用性和可行性。
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| 关 键 词： | 数字流域 虚拟现实技术 河道演变 整体自动建模 可视化分析 |
Automatic modeling and visual analysis of fluvial evolution in virtual environment |
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| YE Yun-tao
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JIANG Yun-zhong
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LIANG Li-li
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WANG Hao.Automatic modeling and visual analysis of fluvial evolution in virtual environment[J].Advances in Water Science,2012,23(2):170-178. |
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| Authors: | YE Yun-tao JIANG Yun-zhong LIANG Li-li WANG Hao |
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| Institution: | State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China |
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| Abstract: | The 3 D virtual simulation technology has changed the way to traditional sense of the world and provided a friendly and high degree of immersion for experts and scholars.It is introduced together with the scientific visualization technology into the sediment research to propose the overall framework of the 3 D visualization system of sediment erosion and deposition based on virtual reality technology.The system realizes the virtual representation of the real watershed,4 D temporal and spatial changes of large-scale river erosion and deposition process in virtual environment and visual analysis of cross-section form change.Several techniques,including the river boundary identification,automatically adaptive modeling of river channel evolution,seamlessly nested modeling between dynamic river and the surrounding watershed scene,Levels of Detail(LOD) of river channel and seamlessly tiling of LOD patches,display mode and control mode for temporal and spatial visualization,interacting with dynamic river channel,extracting the section based on local interpolation,et al.,used in the system are proposed and studied.These techniques are proved to be practicability and feasibility with the Three Gorges Project as an example. |
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| Keywords: | digital river basin virtual reality technology fluvial process automatic modeling visual analysis |
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