DOI QR코드

DOI QR Code

Assessing Temporal and Spatial Salinity Variations in Estuary Reservoir Using EFDC

염분수지 및 EFDC 모형을 이용한 간척 담수화호 염도변화모의

  • Seong, Choung Hyun (Department of Biological Systems Engineering, Virginia Polytechnic Institute and State University)
  • Received : 2014.11.13
  • Accepted : 2014.11.17
  • Published : 2014.11.30

Abstract

Forecasting salinity in an estuary reservoir is essential to promise irrigation water for the reclaimed land. The objective of the research was to assess salinity balance and its temporal and spatial variations in the Iwon estuary reservoir which has been issued by its high contents of salinity in spite of desalination process for four years. Seepage flows through the see dikes which could be one of possible reason of high salinity level of the reservoir was calculated based on the salinity balance in the reservoir, and used as input data for salinity modeling. A three-dimensional hydrodynamic model, Environmental Fluid Dynamics Code (EFDC), was used to simulate salinity level in the reservoir. The model was calibrated and validated based on weekly or biweekly observed salinity data from 2006 to 2010 in four different locations in the reservoir. The values of $R^2$, RMSE and RMAE between simulated and observed salinity were calculated as 0.70, 2.16 dS/m, and 1.72 dS/m for calibration period, and 0.89, 1.15 dS/m, and 0.89 dS/m for validation period, respectively, showing that simulation results was generally consistent with the observation data.

Keywords

References

  1. Ahn, J. M., I. H. Park, S. W. Lyu, and Y. T. Hur, 2012. Evaluation of optimal grid resolution for hydrodynamic proper simulation. Journal of Korean society for geospatial information system 20(1): pp. 109-116. (In Korean) https://doi.org/10.7319/kogsis.2012.20.1.109
  2. Ahn, S. S., D. H. Yim, M. J. Seo, and H. J. Lee, 2008. Sensitivity analysis of RMA2 model parameter variation with hydraulic characteristics of stram junction area. Journal of the environmental sciences 17(7): pp. 783-793. (In Korean) https://doi.org/10.5322/JES.2008.17.7.783
  3. Brigham Young University (BYU), 1995. SMS Hydrodynamic Modeling Reference Manual. Engineering Graphics Laboratory, Provo, Utah.
  4. Byun, C. Y., B. Y. Son, H. Y. Song, S. and G. Kang, 2009. Simulation of soil loss and turbid water movement using watershed(HSPF) and reservoir(EFDC) model in Soyanggang Dam, Journal of Korean society of water environment 2009: p. 5. (In Korean)
  5. Cerco, C. F. and T. M. Cole, 1994. Three-dimension eutrophication model of Chesapeake bay : Volume 1, main report. Technical Report EL-94-4, US Army Engineer Waterways Experiment Station, Vicksburg, MS.
  6. Craig, P. M. 2004. User's manual for EFDC_Explorer : A pre/post processor for the environmental fluid dynamics code.
  7. Hamrick, J. M. 1992. A three dimensional environmental fluid dynamics computer code: Theoretical and computational aspects, Special report, The College of William and Mary, Virginia Institute of Marine Science, Glouceslter Point, VA.
  8. Hamrick, J. M. and M. Z. Moustafa, 1995. Development of the Everglades wetlands hydrodynamic model : 1. Model formulation and physical processes representation. submitted to Water Resources Research.
  9. Hur, Y. T. and J. H. Park, 2009. Assessment of EFDC model for hydrodynamic analysis in the Nakdong River, Journal of Korean water resource association 42(4): pp. 309-317. (In Korean) https://doi.org/10.3741/JKWRA.2009.42.4.309
  10. Jeong, H. Y., 2010. Analysis of sediment transport and deposition in Saemangeum reservoir using the EFDC model. Master thesis, Chungbuk Univ. (In Korean)
  11. Ji, Z. G., G. Hu, J. Shen, and Y. Wan, 2007. Three-dimensional Modeling of Hydrodynamic Processes in the St. Lucie Estuary, Estuarine, Coastal and Shelf Science 73 (2007): pp. 188-200. https://doi.org/10.1016/j.ecss.2006.12.016
  12. Jiang, H and Y. Shen, 2009. Numerical study on salinity stratification in the Oujang River Estuary. Journal of Hydrodynamics 21(6): pp.835-842. https://doi.org/10.1016/S1001-6058(08)60220-6
  13. Kang P. M., 1993. Engineering in land reclamation. 323-327. Hyangmoonsa.pp. (In Korean)
  14. Kim, J. H., G. H. Park, K. C. Kim, and K. S. Suh, 2011. Numerical simulations for dispersion of the suspended sediments near Daesan coastal areas, Journal of Korean Society of Environmental Engineers 33(1): pp. 16-24. (In Korean) https://doi.org/10.4491/KSEE.2011.33.1.016
  15. Kim, J. K., G. I. Kwak, J. H. Jeong, 2008. Three-dimensional mixing characteristics in Seomjin River Estuary, Journal of the Korean Society for Marine Environmental Engineering 11(3): pp. 164-174. (In Korean)
  16. Korea Rural Community Corporation (KRC), 1984. A study for desalination process in an estuary reservoir. 71-72. (In Korean)
  17. Korea Rural Community Corporation (KRC), 2009. A study for ensuring stability on enlarging an unit size of agricultural infrastructure (I), 107. (In Korean)
  18. Korea Rural Development Center (KRDC), 2009. Desalination assessment in the Iwon reclaimed reservoir.
  19. Lee, H. Y., S. W. Seo, and S. C. Yoo, 2010. Simulation of water quality changes in the Saemangeum reservoir induced by dike completion. Journal of Korean society of coastal and ocean engineers 22(4): pp. 258-271. (In Korean)
  20. Ministry of Agriculture (MOA), 1991. Standard for design of agricultural land improvement project plan (Land reclamation). (In Korean)
  21. Ministry of Construction and Transportation (MOCT), 2006. National longterm water plan. 8-14. (In Korean)
  22. Seo, D. I. and J. W. Lee, 2005. Application of 3-D hydrodynamic model, EFDC-Hydro for WASP7.0, Journal of Korean society of environmental engineers conference 1(3): pp. 431-436. (In Korean)
  23. Seo, D. I., M. J. Seo, M. S. Koo, and J. K. Woo, 2009. Serial use of hydrodynamic and water quality model of the Geum River using EFDC-Hydro and WASP7.2, Journal of Korean society of water and wastewater 23(1): pp. 15-22. (In Korean)
  24. Seong, C. H., 2014. Streamflow modeling in data-scarce estuary reservoir watershed using HSPF, Journal of Korean society of agricultural engineers 56(6): pp.129-137. (In Korean) https://doi.org/10.5389/KSAE.2014.56.6.129
  25. U.S. Environmental Protection Agency (USEPA), 2002. User's Manual for Environmental Fluid Dynamics Code (Hydro version) Release 1.00
  26. Schroeder, W. W., D. P. Scott, and W. J. Wiseman, 1990. Salinity Stratification in a River-Dominated Estuary. Estuaries 13(2): pp. 145-154. https://doi.org/10.2307/1351583
  27. Xu, H., J. Lin, and D. Wang, 2008. Numerical study on salinity stratification in the Pamlico River Estuary, Estuarine, Cosastal and Shelf Science 80: pp.74-84. https://doi.org/10.1016/j.ecss.2008.07.014