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자료유형
학술저널
저자정보
김준현 (강원대학교)
저널정보
강원대학교 환경연구소 Journal of the Environment Journal of the Environment Vol.6
발행연도
2009.12
수록면
61 - 66 (6page)

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The vertical infiltration of soil moisture is important with respect to the drainage system, sewer inflow and infiltration, sewer leakage, leakage problem in the waterworks system. Analytical solution and numerical model have been developed to depict the migration profile of the vertical infiltration of soil moisture content. The governing equation of vertical infiltration model has been derived from the mass transport equation of volumetric fraction of water phase. Three dimensional form of the governing equation is called as Buckingham-Richard equation. Analytical solution of this one-dimensional infiltration equation has been derived by neglecting the vertical variation of permeability coefficient. Error function has been used for this solution. The velocity of the soil moisture content has been derived using the solution of the soil moisture content in the governing equation of vertical infiltration. The velocity can be derived by solving the diffusion equation of the velocity. For the solution of this equation, separation of variables technique has been used. Numerical model has been developed for the capillary head instead of soil moisture content for the two phase problem of water and air phase in the vadose zone of the aquifer. The constitutive equations of the relative permeability and saturation have been used. Mass transport equation for each phase has been derived through the combination of the constitutive equation and Darcy’s velocity. Under the assumption of constant pressure of the air phase, these two mass transport equation were combined into one. Finite element method was applied to this final governing equation. For the verification of the model, finite difference model was developed and compared with the finite element model.

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Abstract
Ⅰ. 자유수표면 상부의 부분포화 지하수 유동의 해석
Ⅱ. 토양수분의 일차원 침투 방정식의 해석해
Ⅲ. 토양수분의 일차원 침투 방정식의 수치해
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