1. China Aero Geophysical Survey and Remote Sensing Center for Natural Resources, Beijing 100083, China 2. Key Laboratory of Airborne Geophysics and Remote Sensing Geology, Ministry of Natural Resources, Beijing 100083, China
Water transparency is the key factor of airborne LiDAR bathymetry. Turbid waters produce noise in LiDAR echo signal and weaken the laser pulse or cause a gap. Therefore, it is necessary to study water optical properties. Using MODIS Kd (490 nm) and general bathymetric chart of the oceans (GEBCO) bathymetric data, the authors calculated the maximum detectable depth in China’s coastal area based on CZMIL Nova, and classified the result into 3 types. CZMIL test data from different areas were used to verify the accuracy of the classification. The results show that a total of 211,900 km 2 sea area is suitable for the performance of bathymetric survey with airborne LiDAR. The coastal area of Wenchang to Dongfang of Hainan, Beihai and the east and west of Leizhou peninsula, Rizhao to Qindao of Shangdong and Yinzhou to Suizhong of Liaodong Bay are suitable for the performance of land and sea integrating topographic survey, with the maximum measurable depths estimated by Kd being 20~40 m, 10~20 m, 20~25 m, 10~15 m, respectively.
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