Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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A Study on the Characteristics of Saline Groundwater and Its Well Development in the Western Coastal Area of Jeju Island

제주 서부 해안 지역 염지하수 특성 및 관정 개발에 관한 연구

  • Cho, Eun-Il (Department of Environmental Engineering, Jeju National University) ;
  • Ko, Tak-Kyun (Hangaram Engineeing & Consulting Co. Ltd.) ;
  • Lee, Min-Gyu (Department of Chemical Engineering, Pukyong National University) ;
  • Kam, Sang-Kyu (Department of Environmental Engineering, Jeju National University)
  • Received : 2018.06.05
  • Accepted : 2018.07.03
  • Published : 2018.08.31
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Abstract

The purpose of this study was to minimize salt water intrusion into freshwater aquifers and limit the development of freshwater aquifers, by selecting an appropriate excavation depth of in the western coastal area of Jeju Island. The study site was mostly basaltic lava, which was mainly composed of trachy basalt. A vertical logging test was conducted to investigate the vertical distribution of the groundwater and saline groundwater interface in the study well. It was found that freshwater groundwater, saline groundwater, and freshwater groundwater are distributed from the surface to approximately 16 m, 16~50 m, and 50~60 m, below the ground, respectively. In order obtain saline groundwater and minimize the inflow of freshwater into this well, the drilling depth should be limited in the range of 16~50 m from the surface. Thus, saline groundwater well development should be carried out with reference to the measurement results, which depend on the drilling depth and EC (electrical conductivity) obtained with drilling apparatus for geology and ground handling.

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References

  1. Chun, J. C., Rho, S., 1991, Salinity tolerance of eggs and juveniles of flounder, Paralichthys olivaceus (Temminck et Schlegel), J. Aquaculture, 4, 73-84.
  2. Kim, B. S., Hamm, S. Y., Lee, C. M., Ok, S. I., Cha, E. J., Ko, Y. S., 2011, Features of regional hydrogeology and groundwater distribution of volcanic rocks in Jeju Island, J. Geol. Soc. 47, 263-276.
  3. Kim, J. Y., Oh, Y. K., Ryu, A. P., 2001, Study on the salinization in groundwater of eastern area of Cheju Island. J. Environ. Sci. Intern., 10, 47-58.
  4. Kim, K. Y., Shim, B. O., Park, K. H., Kim, T., Seong, H., Park, Y. S., Koh, G. W., Woo, N. C., 2005, Analysis of hydraulic gradient at coastal aquifers in eastern part of Jeju Island, Econ. Environ. Geol., 38, 79-89.
  5. Kim, S. S., Kim, D. K., Son, P. W., Lee, C. H., Ha, D. S., 2003, Temporal and spatial variation of water quality of the coastal saline groundwaters in Jeju Island, J. Aquaculture, 16, 15-23.
  6. Lee, J. Y., Lee, G. S., Song, S. H., 2007, An Interpretation of changes in groundwater level and electrical conductivity in monitoring wells in Jeju Island, J. Korean Earth Sci. Soc., 28, 925-935. https://doi.org/10.5467/JKESS.2007.28.7.925
  7. Lee, S. H., 2008, Characteristic of hydrogeological and grounwater occurrence in the western coastal areas of Jeju Island, Korea. MS Thesis, Cheju National University, Jeju, Korea.
  8. Ok, S. I., Hamm, S. Y., Kim, B. S., Cheong, J. Y., Woo, N. C., Lee, S. H., Koh, G. W., Park, Y. S., 2010, Characteristics of aquifer system and change of groundwater level due to earthquake in the western half of Jeju Island, Econ. Environ. Geol., 43, 359-369.
  9. Park, G. S., 1994, A Study on the chemical characteristics of ground-water in the coastal of Cheju Island. MS Thesis, Cheju National University, Jeju, Korea.
  10. Water Resource Headquarter of Jeju Special Self-Governing Province, 2012, Sourcebook II of geological columnar section, Jeju Special Self-Governing Province, 812-966.
  11. Waterworks and Sewerage Headquaters of Jeju Special Self-Governing Province, 2016, http://jeju.go.kr/jejuwater/ index.htm.