Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
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Analysis of Hydraulic Characteristics of Yeongsan River and Estuary Using EFDC Model

EFDC-NIER 모델을 이용한 영산강 하구 물흐름 특성 분석

  • Shin, Chang Min (Water Quality Assessment Research Division, National Institute of Environment Research) ;
  • Kim, Darae (Water Quality Assessment Research Division, National Institute of Environment Research) ;
  • Song, Yongsik (GeoSystem Research Corporation)
  • Received : 2019.11.22
  • Accepted : 2019.11.29
  • Published : 2019.11.30
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Abstract

The flow of the middle and downstream of the Yeongsan River is stagnant by two weirs of Seungchon and Juksan and the estuary dam and maintained in freshwater. In this study, the Environmental Fluid Dynamics Code-National Institute of Environment Research(EFDC-NIER) model was applied to the Yeongsan River to simulate water flow, temperature, and salinity stratification. The EFDC-NIER model is an improved model which can simulate multi-functional weirs operation, multiple algal species, and the vertical movement mechanism of algal based on the EFDC model. The simulation results for the water level, water temperature, velocity, and salinity reproduced the observed values well. The mean absolute error(MAE) of the model calibration in the annual variations of the water level was 0.1-0.3 m, water temperature was 0.8-1.7 ℃, velocity was 4.5-7.1 cm/sec, and salinity was 1.5 psu, respectively. In the case of scenario simulation for the full opening of the estuary dam, the water level of the estuary dam was directly impacted by the tide so it was predicted to rise - 1.35 m to 0.2 m on average sea level. The velocity was also predicted to increase from 2.7 cm/sec to 50.8 cm/sec, and the flow rate to increase from 53 ㎥/sec to 5,322 ㎥/sec.

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References

  1. Bang, K. Y., Kim, T. I., Song, Y. S., Lee, J. H., Kim, S. W., Cho, J. G., Kim, J. W., Woo, S. B., and Oh, J. K. (2013). Numerical modeling of sediment transport during the 2011 summer flood in the Youngsan river estuary, Korea, Journal of Korean Society of Coastal and Ocean Engineers, 25(2), 76-93. [Korean Literature] https://doi.org/10.9765/KSCOE.2013.25.2.76
  2. Choi, H. G., Han, K. Y., and Park, J. H. (2017). Reproducibility evaluation of stratification using EFDC model in Nakdong river, Journal of the Korean Society of Civil Engineers, 37(3), 561-573. [Korean Literature] https://doi.org/10.12652/Ksce.2017.37.3.0561
  3. Han, C. S., Park, S. K., Jung, S. W., and Roh, T. Y. (2011). The study of salinity distribution at Nakdong river estuary, Journal of Korean Society of Coastal and Ocean Engineers, 23(1), 101-108. [Korean Literature] https://doi.org/10.9765/KSCOE.2011.23.1.101
  4. Jung, S. Y. and Kim, I. K. (2017). Analysis of water quality factor and correlation between water quality and Chl-a in middle and downstream weir section of Nakdong river, Journal of Korea Society on Water Environment, 39(2), 89-96. [Korean Literature] https://doi.org/10.4491/KSEE.2017.39.2.89
  5. Kang, B. S., Park, H. B., and Kim, J. K. (2015). Saltwater intrusion characteristics in Seomjin river estuary using EFDC, Journal of Fishries and marine sciences education, 27(6), 1842-1853. [Korean Literature] https://doi.org/10.13000/JFMSE.2015.27.6.1842
  6. Kim, D. H. and Ryu, H. H. (2003). Water quality in Mokpo coastal area after a strong rainfall, Journal of the Korean Society for Marine Environmental Engineering, 6(2), 28-37. [Korean Literature]
  7. Kim, E. J., Park, C. M., Na, M. J., Park, H. Y., and Kim, B. S. (2018). Impact analysis of tributaries and simulation of water pollution accident scenarios in the water source section of Han River using 3-D hydrodynamic model, Journal of Korean Society on Water Environment, 34(4), 363-374. [Korean Literature] https://doi.org/10.15681/KSWE.2018.34.4.363
  8. Kim, J. W., Yoon, B. I., Song, J. I., Lim, C, W., and Woo, S. B. (2013). Spatial and temporal variability of residual current and salinity according to freshwater discharge in Yeoungsan River estuary, Journal of Korean Society of Coastal and Ocean Engineers, 25(2), 103-111. [Korean Literature] https://doi.org/10.9765/KSCOE.2013.25.2.103
  9. Korea Marine Environment Management Corporation (KOEM). (2019). Marine Environmet Information System (MEIS), http://meis.go.kr/rest/obj_koem_port_new/obj/ALL/ALL/ALL/20150201/20161130/1 (accessed May 2019).
  10. Korea Meteorological Administraion (KMA). (2019). Meteorological data open portal, https://data.kma.go.kr/data/grnd/selectAsosRltmList.do (accessed May 2019).
  11. Korea Rural Community Corporation (KRCC). (1999). Operational guide of drainage gate of Yeongsan River estuary dam, Korea Rural Community Corporation. [Korean Literature]
  12. K-water. (2019). My water, http://www.water.or.kr/realtime/sub01/sub01/dam/hydr.do (accessed May 2019).
  13. Kwon, K. Y., Lee, P. G., Park, C., Moon, C. H., and Park, M. O. (2001). Biomass and species composition of phytoplankton and zooplankton along the salinity gradients in the Seomjin river estuary, Journal of the Korean Society of Oceangraphy, 6(2), 93-102. [Korean Literature]
  14. Lee, H. D., Ahn, T. J., and Kim, K, S. (2015). Simulations of the water temperature & circulation in the Assan Bay using EFDC Model, Journal of Korean Society of Environmental Technology, 16(6), 566-573. [Korean Literature]
  15. Li, J. P., Dong, S. K., Liu, S. L., Yang, Z. F., Peng, M. C., and Zhao, C. (2013). Effects of cascading hydropower dams on the composition, biomass and biological integrity of phytoplankton assemblages in the middle Lancang-Mekong River, Ecological Engineering, 60, 316-324. https://doi.org/10.1016/j.ecoleng.2013.07.029
  16. Ministry of Environment (ME). (2019). Water Environment Information System (WEIS), http://water.nier.go.kr/waterData/generalSearch.do (accessed May 2019).
  17. National Institute of Environment Research (NIER). (2011). Development of 3-D, Time-Variable Hydrodynamic and Water Quality Model for the Water Quality Forecasting, National Institute of Environment Research. [Korean Literature]
  18. National Institute of Environment Research (NIER). (2014). An Advanced Research on the Water Quality Forecasting System and the Numerical Models(II), National Institute of Environment Research. [Korean Literature]
  19. Prichard, D. W. (1967). Tidal currents in shelf seas-their nature and impacts, Progress in Oceanograpy, 40, 245-261.
  20. Shin, C. M., Min, J. H., Park, S. Y., Choi, J. K., Park, J. H., Song, Y. S., Kim, K. H. (2017). Operational water quality forecast for the Yeongsan river using EFDC model, Journal of Korean Society on Water Environment, 33(2), 219-229. [Korean Literature] https://doi.org/10.15681/KSWE.2017.33.2.219
  21. Sin, Y. S. and Jeong, B. K. (2015). Short-term variations of phytoplankton communities in response to anthropogenic stressors in a highly altered temperate estuary, Estuarine, Coastal and Shelf Science, 156, 83-91. https://doi.org/10.1016/j.ecss.2014.09.022
  22. Son, M. S., Park, J. H., Lim, C. H., Kim, S. K., and Lim, B. J. (2013). Seasonal change of phytoplankton community and water quality in Yeongsan river watershed, Korean Journal of Environmental Biology, 31(2), 105-112. https://doi.org/10.11626/KJEB.2013.31.2.105
  23. Yeongsan River Flood Control Office (YRFCO). (2019). Yeongsan River Flood Control Office (YRFCO), http://yeongsanriver.go.kr/contents.do (accessed May 2019).
  24. Yoon, B. B., Lee, E. J., Kang, T. A., and Shin, Y. S. (2013). Long-term change of phytoplankton biomass (chlotophyll-a), environmental factors and freshwater discharge in Youngsan estuary, The Korean Society of Limnology, 46(2), 205-214. [Korean Literature] https://doi.org/10.11614/KSL.2013.46.2.205
  25. Yun, Y. J., Jang, E. J., Park. H. S., and Chung, S. W. (2018). Evaluation of eutrophication and control alternatives in Sejong weir using EFDC model, Korean Society of Environmental Impact Assessment, 27(6), 548-561. [Korean Literature]