广东省统一深度基准项目的设计研究

Research on Design of Unified Depth Datum Project in Guangdong Province

根据对广东省现有长期验潮站数量、分布以及水位数据情况的分析,确立了在已有长期验潮站的基础上,采用适当布设短期验潮站的方式,对长期验潮站进行加密补充;建立海区调和常数变化模型,并结合水深数据、卫星测高数据,构建海洋潮汐模型;最终建立深度基准模型的总体设计思路。广东省统一深度基准的建立,可实现深度基准面1985高程模型的构建,相邻测区间水深成果的无缝拼接,沿海水深成果与陆地地形成果的相互转换,GNSS技术下的水深测量(无验潮模式)以及对沿海范围内海岸线和海岛岸线的精确推算。

According to the number, distribution and water level of the existing long-term tidal stations in Guangdong Province, we replenished the long-term tidal station by setting up some short tide stations, and established the harmonic constant variation model in the sea area. And then, combining with the depth data and the satellite altimeter data, we constructed the ocean tidal model. Finally, we established the depth datum model.The establishment of unified depth datum in Guangdong Province can realize the construction of the 1985 high depth datum model, the seamless splicing of the water depth data in the adjacent range, the transformation between the water depth data and the land terrain data, the bathymetry based on GNSS technology (without tidal data), and the accurate calculation of the coastline in land and island.