机载激光雷达水深测量是海岸带海陆一体地形测量的一种有效技术。目前，我国尚未形成成熟的实用化机载激光雷达测深系统，也缺乏大规模机载激光雷达测深生产应用经验，急需开展机载激光雷达测深系统应用测试。基于CZMIL Nova Ⅱ机载激光雷达测深系统，在我国海南、广东、广西等南海北部海岸带，开展了机载激光雷达最大测深、测量精度、测量效率等3个方面的应用测试。结果表明，海南蜈支洲岛、广西涠洲岛、广东台山市赤溪镇3个典型区成图最大测深分别达到30、16、3 m，基本符合系统标称测深能力，最大测深受水体清澈度、底质反射率、飞行航高等多种因素影响；海南蜈支洲岛海域30 m深度附近的深度测量精度为0.369 m，符合系统标称精度；基于运-12E型飞机平台，采用常规飞行参数，1个架次有效飞行面积约100 km2、测线长度约500 km，一年可飞行面积约8 000～12 000 km2，测线长度约40 000～60 000 km。此次机载激光雷达测深系统在中国海岸带的大规模应用测试对国内机载激光雷达测深技术研发与应用具有重要参考意义和科学价值。

Airborne lidar bathymetry(ALB) was an effective technology for simultaneous terrain and shallow water bathymetry mapping in coastal zones. Up to present, there had not been mature and practical ALB systems in China, and the experience in large-scale airborne lidar bathymetry production and application was also very little. It was urgent to carry out airborne lidar bathymetry system application test. Using the CZMIL Nova II system, we carried out the application test of the ALB in terms of maximum depth penetration, depth measurement accuracy, and measurement efficiency in Hainan, Guangdong, Guangxi which were located in the northern part of the South China Sea. The results show that the maximum depth penetration of the three typical areas of Wuzhizhou Island in Hainan, Weizhou Island in Guangxi, and Chixi Town in Taishan City in Guangdong reached 30, 16, and 3 m respectively, accorded with the system′s nominal maximum depth penetration capacity. The maximum depth penetration mainly depends on water clarity, bottom reflectivity, flight altitude and other environmental factors. The depth measurement accuracy in Wuzhizhou Island, Hainan is 0.369 m at the 30 m depth, accorded with the system′s nominal accuracy. Based on the Yun-12E aircraft and conventional flight parameters, the effective coverage area is about 100 km2 and the flight line length is about 500 km in a flight mission, the annual coverage area is about 8 000-12 000 km2 and the annual flight line length is about 40 000~60 000 km. This was the large-scale application test of the airborne lidar bathymetry system in the coastal zone of China and it would have important reference significance and scientific value for the research and application of domestic airborne lidar bathymetry technology.