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http://dx.doi.org/10.11108/kagis.2019.22.1.051

Sea level slope of the Korean Peninsula Coast determined by Local Mean Sea Level  

KIM, Tae-Woo (Dept. of Civil, Architectural and Environmental System Engineering, Sungkyunkwan University)
YUN, Hong-Sik (School of Civil, Architectural Engineering & Landscape Architecture, Sungkyunkwan University)
KIM, Kwang-Bae (Dept. of Civil, Architectural and Environmental System Engineering, Sungkyunkwan University)
Publication Information
Journal of the Korean Association of Geographic Information Studies / v.22, no.1, 2019 , pp. 51-61 More about this Journal
Abstract
Computing the sea level slope at the BM(Bench Mark) in the coast areas around the Korean Peninsula is important for establishing height of BM of the Korean geodetic leveling network. In this study, MSL(Mean Sea Level) was recalculated with the long-term tide observation data based on the IHO(International Hydrographic Organization) standard(18.6 years), and the BM height was reanalyzed by precision leveling. The sea surface topography was analyzed by leveling at Mokpo(Mokpo Starting Point), Busan (09-00-00) and Mukho(20-26-00) BMs, and the sea level slope was computed based on the Korean vertical origin point. As a result of this study, the sea level slope of the west and east coasts between Incheon(-2.27cm) and Mukho(17.56cm) located at $37.5^{\circ}N$ was analyzed as 19.83cm. Domestic geodesists and oceanologists have confronted each other with regard to the issue of latitudinal changes in long term MSL. In the west coast, the Mokpo is 1.12cm higher than Incheon, and the Busan is 2.18cm higher than Mukho. Therefore, the west and east coasts have been analyzed as sea level slope rising to the south. It can be used to solve the reestablishment of the Korean geodetic leveling network and the problem of the elevation discrepancy in the BM.
Keywords
Vertical origin point; Sea surface topography; Sea level slope; Leveling network;
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