Journal of Korea Water Resources Association (한국수자원학회논문집)

Korea Water Resources Association (한국수자원학회)
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Comparison between the Spatially Integrated Model and the Spatially Distributed Model in the Nonpoint Source Contaminants of Groundwater

지하수 분산오염원에 대한 공간적분모형과 공간분포모형의 비교

  • Lee, Do-Hun (Dept. of Civil Engineering, Engineering College, Kyunghee University) ;
  • Lee, Eun-Tae (Dept. of Civil Engineering, Engineering College, Kyunghee University) ;
  • Jeong, Sang-Man (Kongju National University)
  • 이도훈 (경희대학교 공과대학 토목공학과 및 환경연구소) ;
  • 이은태 (경희대학교 공과대학 토목공학과) ;
  • 정상만 (공주대학교 공과대학 토목공학과)
  • Published : 1998.04.01
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Abstract

The spatially integrated model (SIM) which can evaluate temporal variation of groundwater quality is proposed in the stream-aquifer setting entered by nonpoint source contaminants. And the developed SIM included unsaturated soil zone and was tested against the spatially distributed model (SDM) of the coupled advection-dispersion and Richards equations for the various hydrologic and aquifer simulating conditions. The result of the comparison showed that the average concentration responses of saturated aquifer and groundwater outflow between the SIM and the SDM was in good agreement, except for the case of the large dispersivity ratio and thick aquifer system. And it is shown that for the cases of the large dispersivity ratio and thick aquifer system the performance of the nonlinear SIM is better than that of the linear SIM for evaluating the average concentration of groundwater outflow response.

하천과 대수층이 연결된 계에서 분산오염원이 유입될 경우에 지하수 수질을 평가할 수 있는 공간적분모형을 제안하였다. 제안된 공간적분모형은 불포화대의 영향이 고려되었으며, 다양한 수문 및 대수층 모의 조건에서 Richards 방정식과 이송-분산 방정식의 공간분포모형에 대한 수치해와 비교를 통하여 공간적분모형을 테스트하였다. 비교 결과에 의하면, 분산도비와 대수층의 두께가 큰 경우를 제외하고는 공간적분모형과 공간분포모형사이의 포화대수층의 평균농도 및 지하수유출의 평균농도는 일치된 반응을 보여주고 있다. 그리고 분산도비와 대수층의 두께가 큰 계에서는 비선형 공간적분모형이 선형 공간적분모형보다 더 좋은 결과를 보여주었다.

Keywords

References

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