| 摘要: |
| 沙滩剖面动态监测是沙滩整治修复工程效果评价的基础性工作，同时也是工程实践中及时发现问题并提出解决方案的关键步骤。由于常规测量手段存在工作效率低、周期长、难以全面覆盖测区等局限性，新型技术在沙滩剖面动态监测中的应用研究显得尤为重要。本研究以厦门天泉湾沙滩养护工程为案例，通过无人机航拍技术和三维激光扫描仪获取沙滩数字正射影像和高程数据，与人工测量结果进行比对和统计分析，研究两种技术的应用价值。研究结果表明，无人机平面坐标精度较高，但高程精度有所偏离；三维激光扫描仪测量数据满足沙滩剖面地形测量精度要求，但易受视场角限制，结果存在扫描噪点和盲区。因此，采用无人机及三维激光扫描仪技术，结合传统测量手段进行沙滩剖面动态监测，在我国广泛分布的沙滩养护工程实践中，具有良好的应用价值。 |
| 关键词: 海洋测量学 无人机 三维激光扫描仪 沙滩剖面动态监测 |
| DOI：10.3969/J.ISSN.2095-4972.2021.03.018 |
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| 基金项目:自然资源部第三海洋研究所基本科研业务费资助项目（海三科2017016） |
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| Application of UAV and 3D laser scanner technology in beach profile dynamic monitoring and analysis of measuring accuracy |
| CHEN Qiuming,HUANG Faming,SONG Peng |
| (Third Institute of Oceanography, MNR, Xiamen 361005, China) |
| Abstract: |
| The dynamic monitoring of beach profile is the basis for evaluating the effect of beach maintenance project. It is also the key step for the timely problem identification and proposing solutions in engineering practice. Since conventional measurement methods have some limitations, such as low efficiency, long period and difficult to cover the whole survey area, it is very important for the study applying new technology in beach profile dynamic monitoring. In this paper, we take the beach maintenance project in Tianquan Bay of Xiamen as an example, and compared the results of UAV and laser measurements with the artificial field measurement. The result shows that the plane coordinate accuracy of UAV can meet the requirements but bias the elevation accuracy. The 3D laser scanner measurement data can meet the requirement of survey accuracy in large-scale beach profile topography but it is restricted by the field angle resulting in scanning noise and blind area. The application of UAV and laser technology combining with traditional measurement method should have a good practicability in the engineering practice of wide area beach maintenance in China. |
| Key words: marine survey UAV three-dimensional laser scanner dynamic monitoring of beach profile |
