Numerical Modeling on the Prediction of Groundwater Recovery in the Youngchun Area, Kyungbook Province

경상북도 영천지역의 지하수위 회복 예측 수치 모델링

  • 이병대 (한국지질자원연구원 지하수지열연구부) ;
  • 추창오 (안동대학교 지구환경과학과) ;
  • 이봉주 (한국지질자원연구원 지하수지열연구부) ;
  • 조병욱 (한국지질자원연구원 지하수지열연구부) ;
  • 함세영 (부산대학교 지질학과) ;
  • 임현철 (한국지질자원연구원 지하수지열연구부)
  • Published : 2003.12.01

Abstract

A modeling was performed to predict the groundwater recovery in the vicinity of the waterway tunnel area using a groundwater flow model MODFLOW. The model was calibrated to reproduce measured groundwater levels and observed flow rates into the tunnel prior to lining, and then used for flow simulation under transient condition. Model predictions under steady-state condition revealed that if tunnel conductance had been reduced by 25% to 90%, groundwater levels would recover between 8% and 72.4% of their initial levels and flow into the tunnel will decrease between 5.5% and 82.7%. In case of 75% tunnel condutance ruduction in transient simulation. most of wells were predicted to recover within 20 years or so. The complete recovery for the wells with the groundwater level over 70 m was found to be impossible. For the 90% tunnel conductance reduction, all wells were found to be recovered within 15 years.

Keywords

waterway tunnel;groundwater level;modeling;flow rate;conductance

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