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Numerical Simulation of Groundwater Discharge Into a Tunnel
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  • Journal title : The Journal of Engineering Geology
  • Volume 25, Issue 3,  2015, pp.369-376
  • Publisher : The Korea Society of Engineering Gelolgy
  • DOI : 10.9720/kseg.2015.3.369
 Title & Authors
Numerical Simulation of Groundwater Discharge Into a Tunnel
Jeong, Jae-Hyeon; Koo, Min-Ho;
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Numerical models simulating groundwater flow are often used to estimate groundwater discharge into a tunnel. In designing numerical models, the grid size should be carefully considered to ensure that groundwater discharge is accurately predicted. However, several recent studies have employed various grid sizes without providing an adequate explanation for their choice. This paper suggests the optimal grid size based on a comparison of numerical models with analytical solutions. Discrepancies between numerical and analytical solutions result from the effect of model boundaries as well as the grid size. By nullifying boundary effects, the errors solely associated with the grid size could be analyzed. The optimal grid size yielding accurate numerical solutions was thus derived. The suggested relationship between tunnel radius and optimal grid size is analogous to the relationship between the equivalent well block radius and grid size.
tunnel;groundwater flow;numerical model;grid size;
 Cited by
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