水库淤积测量点云剖面分析系统研发与应用

Development and application of point cloud profifile analysis system for measuring reservoir sedimentation measurement

为快速对比分析不同时期水库淤积测量中点云剖面特征,及时了解水库各区域淤积状况,提高剖面分析效率,研究并实现水库淤积测量点云剖面分析系统。在三维可视化中读取水库不同时期的水下三维点云数据,通过交互式操作拾取点云对应的区域两点坐标,生成竖向剖面;计算所有点云数据到剖面的距离,筛选该距离不超过设定阈值对应的所有点,投影到剖面上并拟合出不同时期剖面线进行对比分析。以我国西南地区某混凝土重力坝坝前淤积测量数据为依托,应用结果表明,研究成果能为水库不同时期淤积程度分析提供简单、快速的技术手段,提升水库淤积分析智能化水平与效率。

To rapidly compare and analyze point cloud profile characteristics of reservoir sediment accumulation measurements from different periods and to promptly understand the sedimentation status in various reservoir areas thus enhancing the efficiency of profile analysis,a reservoir sediment accumulation point cloud profile analysis system was developed and implemented.By reading underwater three-dimensional point cloud data of the reservoir from different periods in a three-dimensional visualization context and through interactive operations picking twopoint coordinates of the point cloud corresponding region,a vertical profile is generated.The system calculates the distance from all point cloud data to the profile,selects all points whose distance does not exceed a predetermined threshold,projects them onto the profile,and fits the profile lines from different periods for comparative analysis.With the reservoir sediment measurement data of a concrete gravity dam in southwestern China as support,the application results demonstrate that the research outcomes provide a simple and fast technological means for analyzing the degree of sediment accumulation in reservoirs at different periods,enhancing the intelligence level and efficiency of reservoir sedimentation analysis.