面向水库型小流域的多源水利三维建模方法研究

Research on multi-source water conservancy 3D modeling method for reservoir watershed

摘要:

针对大型河道三维可视化建模中采用激光雷达、声呐等传感器获取水下地形建模方式操作复杂且成本较高的缺陷，在利用基础测绘成果构建实景地形模型的基础上，采用多源三维模型融合方法对月塘水库小流域进行实景建模。首先采用倾斜摄影三维建模技术对重点水利工程进行实景建模，并利用专业建模软件对重要控制单元进行构件级建模；然后利用已有河道断面数据结合河流面状矢量数据，实现流域内胥浦河河道实景三维建模；最后通过人机交互方式对多源实景模型进行微调与相互印证，实现月塘水库小流域多源三维模型精准融合构建。研究成果可为河道型水库的预报调度与洪水风险分析提供可视化模型基础与决策支撑。

Abstract:

Aiming at the complex operation and high cost of underwater terrain modeling by using Lidar，sonar and other sensors in 3D visualization modeling in large-scale rivers，the multi-source 3D model fusion method is adopted to build a real terrain model for Yuetang Reservoir watershed on the basis of realistic terrain model built by basic surveying and mapping results. Firstly，the 3D modeling technology of oblique photography is used for the real scene modeling of key water conservancy projects，and the component level modeling of important control units is carried out by professional modeling software. Then，the 3D real scene model of Xupu River is formed by combining the existing channel section data with river surface vector data. Finally，the multi-source reality model is fi ne-tuned and mutually verifi ed by human-computer interaction，and the multi-source 3D model of Yuetang Reservoir watershed is accurately integrated and constructed. The research results provide visual model basis and decision support for the forecast operation and fl ood risk analysis of channel reservoir.