BUILDING A TIDAL STREAM CHART ON NAVIGATION FAIRWAY – APPLYING OF HAIPHONG FAIRWAY, VIETNAM
Pham Ky Quang1,*, Vu Van Duy2, Co Tan Anh Vu3, Nguyen Van Cang3, Pham Nguyen Dang Khoa3, Trinh Xuan Tung1
1 School of Excellent Education, Vietnam Maritime University, Haiphong, Vietnam.
2 School of Mechanical Engineering, Vietnam Maritime University, Haiphong, Vietnam
3Hochiminh City University of Transport, Hochiminh City, Vietnam.
*Corresponding Author Email: [email protected]
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The aim of this article is to present an example of the current chart (in particular, tidal stream charts, meaning: current caused by tidal), for safe navigation on the fairway. Since establishing the process of current-chart cartography, this cartography is established not only based on the annual data figures of tidal, nautical charts and surveyed data of Observation Station but also using the CFD application to simulate the flow as well as the speed at a specific time (magnitude and direction of speed vector). For demonstration, the authors built a Current Chart of Haiphong fairway in 2019. Regarding the input figures, besides the physical dimension of the fairway, the current speed of the Hon Dau (Haiphong) area is also a crucial factor. Therefore, current speed has to be corrected by these factors: results of interpolation calculation from the tidal table, data of observation station and survey figures at particular times of cross-sections of the fairway. The correction is to minimize the errors which cause by monthly or seasonally precipitation, etc. However, in this demonstration, we will not consider extreme weather conditions (typhoons, flooding, thunderstorm, etc.).