Continuous Depth Datum–Based Dynamic Bathymetric Model: Construction and Application

Abstract

Ding, F.; Zhou, J.; Zhang, J., and Zhang, A., 2020. Continuous depth datum–based dynamic bathymetric model: Construction and application. In: Liu, X. and Zhao, L. (eds.), Today's Modern Coastal Society: Technical and Sociological Aspects of Coastal Research. Journal of Coastal Research, Special Issue No. 111, pp. 156–161. Coconut Creek (Florida), ISSN 0749-0208.Safety is a priority issue in the shipping industry. Dynamic navigation service is a key element in navigation safety. In this paper, the finite volume coastal ocean model (FVCOM) was used to establish a high-precision tidal model. The depth reference value of each grid point was calculated by harmonic analysis method, and then a dynamic bathymetric model based on a continuous datum was constructed by combining the chart depth and tide level. In order to provide dynamic bathymetric service for navigators, this paper presented an algorithm for ship navigation time-window extraction based on the dynamic bathymetric model. The results show that as the most important basis for the construction of the dynamic water depth model, the mean absolute error (MAE) of the tidal level simulated FVCOM can reach within 5 cm in the focus area and around 10 cm in the nonfocus area. The navigation time-window extraction algorithm can effectively output the nearest navigable period of the ship. Accordingly, the dynamic bathymetric service in this paper is a structural and methodological change from the traditional bathymetric method.