In this paper results of a numerical model, based on the TIDEFLOW-2D Software, for the tidal oscillation and current in the Gulf of Tonkin (GT) are presented . The model was tested as follows: i) the observed values of the four main tidal constituents M2 , S2, K i, 01 at the 44 coastal stations and islands were compared with computed ones; ii the computed tidal levels ware compared with the correlative ones in the Tide Tables. | Vietnam Journal of Mechanics, NCST of Vietnam Vol. 23, 2001, No 1 (25 - 33) A NUMERICAL MODEL FOR THE TIDAL OSCILLATION AND CURRENT IN THE GULF OF TONKIN TRAN THI NGOC DUYET, PHAM VAN NINH , Do NGoe QuYNH Institute of Mechanics, NCST of Vietnam ABSTRACT. in this paper results of a numerical model, based on the TIDEFLOW-2D Software, for the tidal oscillation and current in the Gulf of Tonkin (GT) are presented . The model was tested as follows : i) the observed values of the four main tidal constituents M2 , S 2, K i, 01 at the 44 coastal stations and islands were compared with computed ones; ii) . t he computed tidal levels ware compared with the correlative ones in the Tide Tables at t he six stations: Hon Gai, Cua Ong, Hon Dau, Cua Hoi, Cua Gianh and C ua Tung in m any monthly periods; iii) t he results of computed tidal levels and currents were compared wit h the observed d ata. The results of testing show a good agreement between the available d ata and computed values , therefore we can use t his model for simulation t ide level and current of GT. The results of using thjs model in GT: distribution of t he major harmonic const ituents ; the tidal elevation and current patterns; the extremal values of the tidal level and , . will be published later. 1. Introduction Up to now, in Vietnam, tidal regime for the Gulf of Tonkin (GT) has been studied and simulated by many authors . In the Gulf, there exist six national tidal stations measuring tidal oscillation: Cua Ong, Hon Gai , Hon Dau, Cua Hoi, Cua Gianh and Cua 1\mg. However, research results on tidal current in the region are limited. Very few comparisons between observed tidal currents and computed ones had been done for GT. There exist several 2D models (4] for tidal, wind drift level and current have been deyeloped by Center for Marine Survey, Research and Consult ation (CMESRC ), Hanoi Institute of Mechanics, whic4 have overcome quite well this lack. In this paper we present the .
