Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Analyzing Spatio-Temporal Variation of Groundwater Recharge in Jeju Island by using a Convolution Method

컨벌루션 기법을 이용한 제주도 지하수 함양량의 시공간적 변화 분석

  • Shin, Kyung-Hee (K-water Research Institute) ;
  • Koo, Min-Ho (Department of Geoenvironmental Sciences, Kongju National University) ;
  • Chung, Il-Moon (Water Resources Research Dept., Korea Institute of Construction Technology) ;
  • Kim, Nam-Won (Water Resources Research Dept., Korea Institute of Construction Technology) ;
  • Kim, Gi-Pyo (Water Resources Office)
  • 신경희 (K-water연구원) ;
  • 구민호 (공주대학교 지질환경과학과) ;
  • 정일문 (한국건설기술연구원 수자원연구실) ;
  • 김남원 (한국건설기술연구원 수자원연구실) ;
  • 김기표 (제주특별자치도 수자원본부)
  • Received : 2013.12.16
  • Accepted : 2014.04.02
  • Published : 2014.04.30
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Abstract

Temporal variation of groundwater levels in Jeju Island reveals time-delaying and dispersive process of recharge, mainly caused by the hydrogeological feature that thickness of the unsaturated zone is highly variable. Most groundwater flow models have limitations on delineating temporal variation of recharge, although it is a major component of the groundwater flow system. A new mathematical model was developed to generate time series of recharge from precipitation data. The model uses a convolution technique to simulate the time-delaying and dispersive process of recharge. The vertical velocity and the dispersivity are two parameters determining the time series of recharge for a given thickness of the unsaturated zone. The model determines two parameters by correlating the generated recharge time series with measured groundwater levels. The model was applied to observation wells of Jeju Island, and revealed distinctive variations of recharge depending on location of wells. The suggested model demonstrated capability of the convolution method in dealing with recharge undergoing the time-delaying and dispersive process. Therefore, it can be used in many groundwater flow models for generating a time series of recharge.

Keywords

References

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