A STUDY ON OBSERBATION ERROR IN SINGLE-HOLE GROUNDWATER OBSERBATION USING NUMERICAL ANALYSIS

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  • 単孔式地下水観測における観測誤差の定量評価に関する数値解析的検討

Abstract

<p> The quantitative evaluation of the error due to the influence of the strainer inside the groundwater observation hole was examined by numerical analysis based on the Darcy-Brinkman equation. It was confirmed that the entire region can be analyzed in a unified and stable manner by treating the permeability at the boundary between the fluid region and the porous region by the harmonic mean method. In addition, in the case of a 13 % aperture ratio, it was quantitatively shown that it was 18 mm from the side wall as a region containing a ± 10% error with respect to the flow velocity at the center of the hole.</p>

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