Journal of Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회논문집)

Korean Society of Coastal and Ocean Engineers (한국해안·해양공학회)
권호 표지
DOI QR코드

DOI QR Code

Variation of Density Stratification due to Fresh Water Discharge in the Kwangyang Bay and Jinju Bay

광양만과 진주만 해역에서 담수 유입으로 인한 밀도성층 변화

  • Received : 2008.12.16
  • Accepted : 2011.02.14
  • Published : 2011.02.28
Download PDF
⟨ Previous Next ⟩

Abstract

This study simulate three-dimensional ocean circulation patterns using the EFDC model in the Kwangyang Bay and Jinju Bay, considering tide, water temperature and salinity. The numerical model results were verified using observed data. The model results well reproduced the observed data. As a result, ocean circulation patterns in the study area show convergence and divergence in the middle area of Noryang waterway and Daebang waterway, the residual flow patterns show typical two-layer circulation. According to the change of the density stratification in the Kwangyang Bay and Jinju Bay, the effect of fresh water is dominant in study area. In the case of Jinju Bay, although it is strongly influenced by the Namgang fresh water, also it is affected by Seomjin River when there is no discharge by Namgang Dam. On the other hand, the stratification of the Kwangyang Bay is relatively enhanced by the discharge of Namgang Dam.

본 연구에서는 EFDC 모델을 이용하여 광양만과 진주만 해역에 대한 조석과 수온, 염분을 고려한 3차원 해수순환 양상을 재현하였다. 수치모델 결과는 관측 자료를 이용하여 검증하였고 그 결과 모델은 관측결과를 잘 재현하였다. 실험 결과, 연구해역의 해수순환은 노량수도와 대방수도 중간 해역에서 해수가 수렴 및 발산되는 양상을 보이고 잔차류는 전형적인 2층 순환구조를 보인다. 모델을 통해 광양만과 진주만 일대의 밀도성층 변화를 분석한 결과, 연구해역은 담수의 영향이 지배적인 해역으로 진주만의 경우 남강댐 방류의 영향을 지배적으로 받는 해역이지만 남강댐에서 방류를 하지 않는 경우에는 섬진강의 영향도 받는 것으로 나타났다. 한편 남강댐 방류시에는 광양만의 성층이 상대적으로 강화되는 결과를 볼 수 있었다.

Keywords

References

  1. 김태인, 이형래, 장경일 (2006). 새만금해역에서 밀도성층의 계 절변동. Ocean and polar Research, 28(3), 339-352. https://doi.org/10.4217/OPR.2006.28.3.339
  2. 최현용, 이상호, 오임상 (1998). 황해 중부 연안 수온전선역의 정량적 해석. 한국해양학회지, 바다, 3, 1-8.
  3. 추효상, 이병걸, 이규형 (2002). 다층 진단모델에 의한 광양만의 잔차류 수치실험. 한국환경과학회지, 11, 637-650.
  4. 한성대 (1995). Eulerian-Lagrangian 수송 모형에 의한 광양만의 유류확산 모의. 대한환경공학회지, 17(8), 735-747.
  5. Blumberg, A.F. and Mellor G.L. (1987). A description of a three dimensional Coastal Ocean Model. Ed. by N. S. Heaps, Coast, Est. Sci., 4, 1-16. https://doi.org/10.1029/CO004p0001
  6. Cho, C.W. (2005). A study on the circulation between the Gwangy-ang bay and the Jinju bay, the south coast of Korea. M.S. thesis, Chonnam National University, 72 p.
  7. Hamrick. J.M. (1992). A three-dimensional environmental fluid dynamics computer code: theoretical and computational aspects. Special Report in Applied Marine Science and Ocean Engineering (SRAMSOE) No. 317, Virginia Institute of Marine Science (VIMS), VA.
  8. Hamrick, J.M. (1994). Linking hydrodynamic and biogeochemical transport and transformation models for estuarine and coastal waters. In M. L. Spaulding, K. W. Bedford, A. F. Blumberg, R. T. Cheng, & J. C. Swanson (Eds.). Estuarine and coastal modeling III (pp. 591.608). New York: ASCE.
  9. Jung, K.Y. (2007). Three-dimensional numerical modeling of tidal, wind-driven and density currents in the Kangjin Bay, South Sea, Korea. M.S. thesis, Chungnam National University, 130 p.
  10. Lee, B.-G. and Cho, H.-D. (1998). The spatial characteristics of stratification in Deukryang Bay, Korea. J. Kor. Environ. Sci. Soc., 7, 223-231.
  11. Lee. J.C., Kim, J.C. and Park, M.W. (2006). Observations of current in the Northeastern Gwangyang bay. Journal of the Korean Society of Oceanography, 11(4), 136-142.
  12. Lie, H.-J., Lee, S. Cho, S.-H. and Kim, C.-H. (2002). Tidal front in the main tidal channel of Kyunggi Bay, eastern Yellow Sea. J. Kor. Soc. Oceanogr., 37, 10-19.
  13. Mellor G.L. and Yamada, T. (1982). Development of a turbulence closure model for geophysical fluid problems, Review of Geophysics and space Physics. 20, 851-875. https://doi.org/10.1029/RG020i004p00851
  14. Moustafa, M.Z. and Hamrick, J.M. (2000). Calibration of the wetland hydrodynamic model to the everglades nutrient removal project. Water Quality and Ecosystem Modelling, 1, 141-167. https://doi.org/10.1023/A:1013938700446
  15. Palacios-Hernndez, E., Beier, E., Lavn, M.F. and Ripa, P. (2002). The effect of the seasonal variation of stratification on the circulation of the northern Gulf of California. J. Phys. Oceanogr., 32, 705-728. https://doi.org/10.1175/1520-0485(2002)032<0705:TEOTSV>2.0.CO;2
  16. Park K., Jung, H.S., Kim, H.S. and Ahn, S.M. (2005). Three-dimensional hydrodynamic-eutrophication model(HEM-3D) : application to Kwang-Yang bay, Korea. Marine Environmental Research, 171-193.
  17. Rippeth, T.P., Fisher, N.R., and Simpson, J.H. (2001). The cycle of turbulent dissipation in the presence of tidal straining. J. Phys. Oceanogr., 31, 2458-2471. https://doi.org/10.1175/1520-0485(2001)031<2458:TCOTDI>2.0.CO;2
  18. Ro, Y.J., Jun, W.S., Jung, K.W. and Eom, H.M. (2007). Numerical modeling of tide and tidal current in the Kangjin Bay, South Sea, Korea. Ocean Science Journal, 42(3), 153-163. https://doi.org/10.1007/BF03020919
  19. Ro, Y.J. and Jung, K.Y. (2010). Impact of the dam water discharge on the circulation system in the Kangjin Bay, South Sea, Korea. Ocean Science Journal, 45(1), 7-25. https://doi.org/10.1007/s12601-010-0002-7
  20. Simpson, J.H. and Bowers, D. (1981). Models of stratification and frontal movement in the shelf seas. Deep-Sea Res., 28, 727-738. https://doi.org/10.1016/0198-0149(81)90132-1
  21. Simpson, J.H., Brown, J., Matthews, J.P. and Allen, G. (1990). Tidal straining, density currents and stirring in the control of estuarine stratification. Estuaries, 13, 125-132. https://doi.org/10.2307/1351581
  22. Sisson, G.M., Shen, J., Kim, S.-C., Boon, John, D. and Kuo, A.Y. (1997). VIMS Three-Dimensional Hydrodynamic-Eutrophication Model (HEM-3D): Application of the Hydrodynamic Model to the York River System. SRAMSOE #341. SMS/VIMS, College of William and Mary, Gloucester Point, VA. 123 pp.

Cited by

  1. Hypoxia Estimation of Coastal Bay through Estimation of Stratification Degree vol.20, pp.5, 2014, https://doi.org/10.7837/kosomes.2014.20.5.511
  2. Modeling for Pollution Contribution Rate of Land based Load in Masan Bay vol.22, pp.1, 2016, https://doi.org/10.7837/kosomes.2016.22.1.059
  3. Changes in Sea Water Characteristics Due to Operation of Shihwa Tidal Power Plant vol.25, pp.4, 2013, https://doi.org/10.9765/KSCOE.2013.25.4.219
  4. Temporal and Spatial Variations of Sea Surface Temperature in Jinju Bay in the South Coast of Korea vol.21, pp.4, 2015, https://doi.org/10.7837/kosomes.2015.21.4.315
  5. Numerical Modeling of Circulation Characteristics in the Kwangyang Estuarine System vol.26, pp.4, 2014, https://doi.org/10.9765/KSCOE.2014.26.4.253
  6. Consideration on Changes of Density Stratification in Saemangeum Reservoir vol.18, pp.2, 2015, https://doi.org/10.7846/JKOSMEE.2015.18.2.81