基于精密潮汐模型建立的汕头市深度基准

The Depth Datum of Shantou City Based on the Precise Tidal Model

由于汕头市及附近海域的潮汐变化、沿岸离散验潮站处的L值以及由空间内插法构建深度基准面L值模型,均难以精确描述深度基准面值L的空间分布。论文以精密潮汐模型为基础,按定义算法计算各网格点处的L值,再对验潮站处的L值进行修正,建立了汕头市深度基准模型,为实现陆海统筹和深度基准与高程基准的统一转化提供基础性保障。

Due to the tidal variation in Shantou City and its adjacent sea, it’s difficult for the L value model constructed at the coastal discrete tide gauge station by the spatial interpolation method, to accurately describe the spatial distribution of the depth datum value L. In this paper, based on the precise tidal model, the L value at each grid point is calculated and revised according to the defined algorithm. The establishment of Shantou depth datum model provides basic guarantee for the realization of land and sea coordination and the unified transformation of depth datum and vertical datum.