基于IMAGENEX DT101多波束测深系统水下DEM建模研究

Research on Underwater DEM Based on IMAGENEX DT101 Multibeam Bathymetry System

水下数字高程模型的建立可以提高水下地形直观可视化表达效果,更精确地表达水下地形的目标大小、形态及坡度变化规律,为水利工程建设、水库清淤、防洪抗旱等工作提供有力的数据支撑。多波束测深系统具有大范围、高效率和高精度等优点,把测量技术从传统的以点代面、以线代面的测量扩展到了真正意义的面的测量,为水下数字高程模型建立提供高精度、高密度的原始数据。本文以辽宁某水库1∶2 000水下地形测量工程项目为例,基于IMAGENEX DT101多波束测深系统,研究了其水下地形数据采集的具体流程和数据处理关键技术,并利用Arc GIS建立了水下数字高程模型。结果表明:IMAGENEX DT101多波束测深系统能够快速、高效地获取水下地形测量数据,其成果精度满足了相关规范要求,可以推广应用到其他水库与河流相应比例尺水下数字高程模型建立。

The establishment of underwater digital elevation model can improve the visualization of underwater terrain visualization,and express the target size,shape and slope of the underwater terrain more accurately,and provide a powerful method for the construction of water conservancy project,reservoir dredging,flood control and drought resistance Data support. The Multibeam Bathymetry System has a wide range,high efficiency and high precision measurement advantages,the measurement technology from the traditional point to face,to the line of surface measurement extended to the real sense of the measurement. It provides high precision and high density raw data for the underwater digital elevation model. In this paper,a reservoir in Liaoning 1 ∶2 000 underwater topography measurement project as an example. The Based on the IMAGENEX DT101 Multibeam Bathymetry System,this paper studies the concrete technology of underwater terrain data acquisition and the key technology of data processing,and uses ARCGIS to establish the underwater Digital elevation model. The results show that the IMAGENEX DT101 Multibeam Bathymetry System can quickly and efficiently obtain the underwater terrain measurement data. The results can meet the requirements of the relevant specifications and can be applied to other reservoirs and rivers corresponding to the scale of the underwater digital elevation model.