机载雷达在藻砂分离监测中的应用研究

Application of Airborne LiDAR in Algae and Sand Separation and Monitoring

为研究如何利用无人机航测设备搭载激光雷达实现近海植被与砂石分离检测,本文以广东省湛江市XW-East-JH20海砂开采海域测绘项目为例进行实测研究。为区分不同物质在不同激光波段下的回波情况及实测效果,本文选用了4个波段进行分别测试,最终识别出区分度最高的两个波段进行相关性分析,得到细砂、砂石、藻类雷达监测区分度最高的测绘波段用于实测,并通过测绘成果人工复核,得出运用本文所述方法可以有效对藻砂分布情况进行监测的结论。

This paper studies how to realize the separation detection of offshore vegetation and sand with UAV airborne LiDAR,and takes XW-East-JH20 sea sand mining area mapping project in Zhanjiang city,Guangdong province as an example.In order to distinguish echo conditions of different substances in different laser bands and the measured results,this paper selected four bands for separation testing,and finally identified the two bands with the highest differentiation for correlation analysis.The mapping bands with the highest differentiation for LiDAR monitoring of fine sand,sand and algae are obtained for measurement,and are manually reviewed through the mapping results.It is concluded that the method described in this paper can be used to monitor the distribution of algal and sand effectively.