Advanced SearchSearch Tips
Comparison of Seawater Exchange Rate of Small Scale Inner Bays within Jinhae Bay
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Comparison of Seawater Exchange Rate of Small Scale Inner Bays within Jinhae Bay
Kim, Nam Su; Kang, Hoon; Kwon, Min-Sun; Jang, Hyo-Sang; Kim, Jong Gu;
  PDF(new window)
For the assessment of seawater exchange rates in Danghangpo bay, Dangdong bay, Wonmun bay, Gohyunsung bay, and Masan bay, which are small-scale inner bays of Jinhae bay, an EFDC model was used to reproduce the seawater flow of the entire Jinhae bay, and Lagrange (particle tracking) and Euler (dye diffusion) model techniques were used to calculate the seawater exchange rates for each of the bays. The seawater exchange rate obtained using the particle tracking method was the highest, at 60.84%, in Danghangpo bay, and the lowest, at 30.50%, in Masan bay. The seawater exchange rate calculated based on the dye diffusion method was the highest, at 45.40%, in Danghangpo bay, and the lowest, at 34.65%, in Masan bay. The sweater exchange rate was found to be the highest in Danghangpo bay likely because of a high flow velocity owing to the narrow entrance of the bay; and in the case of particle tracking method, the morphological characteristics of the particles affected the results, since once the particles get out, it is difficult for them to get back in. Meanwhile, in the case of the Lagrange method, when the particles flow back in by the flood current after escaping the ebb current, they flow back in intact. However, when a dye flows back in after escaping the bay, it becomes diluted by the open sea water. Thus, the seawater exchange rate calculated based on the dye diffusion method turned out to be higher in general, and even if a comparison of the sweater exchange rates calculated through two methods was conducted under the same condition, the results were completely different. Thus, when assessing the seawater exchange rate, more reasonable results could be obtained by either combining the two methods or selecting a modeling technique after giving sufficiently consideration to the purpose of the study and the characteristics of the coastal area. Meanwhile, through a comparison of the degree of closure and seawater exchange rates calculated through Lagrange and Euler methods, it was found that the seawater exchange rate was higher for a higher degree of closure, regardless of the numerical model technique. Thus, it was deemed that the degree of closure would be inappropriate to be used as an index for the closeness of the bay, and some modifications as well as supplementary information would be necessary in this regard.
Seawater exchange rate;Residence time;Euler method;Lagrangian method;EFDC model;Jinhae Bay;
 Cited by
Dynamics of the Physical and Biogeochemical Processes during Hypoxia in Jinhae Bay, South Korea, Journal of Coastal Research, 2017, 33, 4, 854  crossref(new windwow)
Cho, J.K., Kim, D.K., Lee, M.O. and Oh, T.G., 2010, "A Numerical Estimation on Extension of Marine Afforestation Area using Particle Tracking Method", J. Korean Soc. Mar. Environ. Eng., Vol. 34, No. 6, 922-934. crossref(new window)

Hamrick, J.M., 1992, "A three-dimensional environmental fluid dynamics computer code : Theoretical and computational aspects", The College of William and Mary, Virginia Institute of Marine Science, Special Report 317, VA. 1-63.

International EMECS Center, 2001, Environmental Guidebook on the Enclosed Coastal Seas of Japan (88 sea areas), 1-177.

Jang, C.H., Kim, S.T., Kim, H.S., Kim, K.H. and Song, M.S., 2010, "Efficiency Tests of Seawater Exchange System for Enhancement of Seawater Quality", J. Korean Soc. Mar. Environ. Eng., Vol. 13, No. 3, 206-215.

Kim, B.K., 2012, "Seawater exchange characteristics in a semienclosed bay based on field observations and numerical", PhD Thesis, Chonnam National Univ., Korea. 1-148

Kim, C.K., 1994, "Three-Dimensional Numerical Model Experiments of Tidal and Wind-Driven Currents in Chinhae Bay", J. Kor. Soc. Oceanogr., Vol. 29, No. 2, 59-106.

Kim, G.S., Ryu, H.S. and Kim, K.M., 2013, "A Study on the Water Exchange Plan with Disaster Prevention Facilities in Masan Bay", J. Navig. Port Res., Vol. 37, No. 6, 637-645. crossref(new window)

Mellor, G.L. and Yamada, 1982, "Development of a turbulence closure model for geophysical fluid problems", Rev. Geophys. Space Phys., Vol. 20, 851-875. crossref(new window)

Moon, J.H., 2009, A study of factors on algal bloom outbreaks in Jinhae Bay by numerical and PCA methods, Department of Ocean Engineering Graduate School Chonnam National Univ., 1-167.

Park, K, Kuo, A.Y. Shen, J., and Hamrick, J.M., 1995, "A threedimensional hydrodynamic-eutrophication model (HEM-3D): description of water quality and sediment process submodels", Special Report in Applied Marune Science and Ocean Engineering No. 327, Virginia Institute of Marine Science.

Park, S.E., Hong, S.J. and Lee, W.C., 2009, "Calculating Average Residence Time Distribution Using a Particle Tracking Model", J. Ocean Eng. Technol., Vol. 23, No. 2, 47-52.

Park, S.E., Lee, W.C., Hong, S.J., Kim, H.C. and Kim, J.H., 2011, "Variation in Residence Time and Water Exchange Rate by Release Time of Pollutants Over a Tidal Cycle in Masan Bay", J. Korean Soc. Mar. Environ. Eng., Vol. 14, No. 4, 249-256. crossref(new window)

Ryu, C. R., Kim, J. K. and Seol. D. G., 1998, "The Tidal Water Exchange Estimation Method based on Particle Tracking Model", J. Ocean Eng. Technol., Vol. 12, No. 4, 76-82.

Suh, S.W. and Lee, H.Y., 2011, "Analysis of Hydrodynamic Change around the Saemangeum Area Using a Particle Tracking Method", J. Korean Soc. Coast. Ocean Eng., Vol. 23, No, 6, 442-450. crossref(new window)