无人机机载激光雷达测绘技术在航道整治工程中的应用

Application of UAV airborne lidar surveying and mapping technology in waterway regulation project

机载激光雷达测绘技术具有穿透植被、灵活性强、高精度以及作业安全等优点,结合无人机技术无需专门起降场、作业灵活、转场方便和成本较低的特点,能够快速获取地表三维点云数据,广泛应用于多个领域。在黑沙洲水道航道整治二期工程中,对重点局部区域在不同阶段利用无人机机载激光雷达测绘技术进行多次测绘,得到高精度地表丰富信息,结合多波束水深测量得到的水下地形数据,对整治前、整治中和整治后的抛填、淤积、崩塌和冲刷数据进行综合分析和评价,指导工程设计、施工、监测和验收,为类似工程实践提供技术范例。

Airborne lidar surveying and mapping technology has the advantages of vegetation penetration,strong flexibility,high precision,and safe operation.Unmanned aerial vehicle(UAV)needs no special take-off and landing field and features flexible operation,convenient transfer,and low cost.The combination of such technologies can quickly obtain the surface 3D point cloud data,which is widely used in many fields.In Phase II of the Heishazhou waterway regulation project,the UAV airborne lidar surveying and mapping technology is conducted multiple times in key local areas in different stages to obtain high-precision surface information.Combined with the underwater topographic data obtained from multibeam bathymetric surveying,the data of filling,siltation,collapse and scour are comprehensively analyzed and evaluated before,during,and after regulation.It guides the engineering design,construction,monitoring,and acceptance,which provides a technical example for similar engineering practices.