Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Development of a Transient Groundwater Flow Model in Pyoseon Watershed of Jeju Island: Use of a Convolution Method

컨벌루션 기법을 이용한 제주도 표선유역 부정류 지하수 흐름 모델 개발

  • Kim, Seung-Gu (Sung Ji Engineering) ;
  • Koo, Min-Ho (Department of Geoenvironmental Sciences, Kongju National University) ;
  • Chung, Il-Moon (Water Resources Research Dept., Korea Institute of Construction Technology)
  • 김승구 (성지엔지니어링) ;
  • 구민호 (공주대학교 지질환경과학과) ;
  • 정일문 (한국건설기술연구원 수자원연구실)
  • Received : 2015.01.26
  • Accepted : 2015.04.01
  • Published : 2015.04.30
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Abstract

Groundwater level hydrographs from observation wells in Jeju island clearly illustrate distinctive features of recharge showing the time-delaying and dispersive process, mainly affected by the thickness and hydrogeologic properties of the unsaturated zone. Most groundwater flow models have limitations on delineating temporal variation of recharge, although it is a major component of the groundwater flow system. Recently, a convolution model was suggested as a mathematical technique to generate time series of recharge that incorporated the time-delaying and dispersive process. A groundwater flow model was developed to simulate transient groundwater level fluctuations in Pyoseon area of Jeju island. The model used the convolution technique to simulate temporal variations of groundwater levels. By making a series of trial-and-error adjustments, transient model calibration was conducted for various input parameters of both the groundwater flow model and the convolution model. The calibrated model could simulate water level fluctuations closely coinciding with measurements from 8 observation wells in the model area. Consequently, it is expected that, in transient groundwater flow models, the convolution technique can be effectively used to generate a time series of recharge.

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