Abstract

This article presents themethod of using tidal calculation model MIKE21 FD to adjust tides in referringseabed topographic depth based on regional mean sea surface model (MBTBKV98) andregional lowest sea surface model (MBTNKV170), which is published in document[4]. The accuracy assessing results of the difference between referred depthsbased on the water level observations at temporary coastal tidal gauge stationand tidal calculation model in Hai Phong sea reached 0.034m; difference betweenreferred depths based on water level observations at tide gauge station andMBTBKV98 model, combined with model tide data reached 0.041m, while thedifference between referred depth based on lowest sea surface at tide gaugestation and model MBTNKV170 combined with model tide data reached 0.047m. Thisshows that using the MIKE21 FD tidal calculation model to adjust the tide inreferring seabed topographic depth measurements based on the sea surface modelsfully meets the requirements of creating seabed topographic maps and sea chartsat medium and smaller scale ranges in Vietnamese waters.