Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Analysis on Groundwater Flow According to Low Permeable Layer Structure over Seongsan Watershed of Jeju Island

제주도 성산유역의 저투수층 구조에 따른 지하수 흐름 분석

  • Kim, Min-Chul (Department of Civil Engineering, Jeju National University) ;
  • Yang, Sung-Kee (Department of Civil Engineering, Jeju National University) ;
  • Oh, Seung-Tae (Department of Civil Engineering, Jeju National University)
  • Received : 2014.12.19
  • Accepted : 2015.04.01
  • Published : 2015.04.30
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Abstract

The depth of low permeable layer in Jeju Island was analyzed using the geologic columnar section data. The highest low permeable layer was found in center of Mt. Halla and the deepest area was in eastern part of Jeju Island. The study area, Seongsan watershed, is located in the eastern part of Jeju where the low permeable layer showing deep in a northward direction. Based on this analysis, the MODFLOW modeling was performed for groundwater flow of Seongsan watershed. The boundary of Seongsan watershed was set up as a no-flow and the modeling result showed the difference -0.26~0.62 m compared to the observed groundwater level. Meanwhile, MODFLOW model results considering low permeable layer showed -0.26~0.36 m differences compared to groundwater level and indicated more accurate than no-flow method result. Therefore, to interpret the groundwater flow over Seongsan watershed, comprehensive consideration including the low permeable layer distribution below the basalt layer is needed.

Keywords

References

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  1. Analysis of Water Level Fluctuations according to Groundwater Development and Pumping Duration vol.25, pp.1, 2016, https://doi.org/10.5322/JESI.2016.25.1.135