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KMID : 1024520190280090737
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Journal of the Environmental Sciences
2019 Volume.28 No. 9 p.737 ~ p.749
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Sensitivity Analysis of Artificial Recharge in Consideration of Hydrogeologic Characteristics of Facility Agricultural Complex in Korea : Hydraulic Conductivity and Separation Distance from Injection Well to Pumping Well
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Choi Jung-Chan
Kang Dong-Hwan
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Abstract
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In this study, the sensitivity analysis of hydraulic conductivity and separation distance (distance between injection well and pumping well) was analyzed by establishing a conceptual model considering the hydrogeologic characteristics of facility agricultural complex in Korea. In the conceptual model, natural characteristics (topography and geology, precipitation, hydraulic conductivity, etc.) and artificial characteristics (separation distance from injection well to pumping well, injection rate and pumping rate, etc.) is entered, and sensitivity analysis was performed 12 scenarios using a combination of hydraulic conductivity (10-1 cm/sec, 10-2 cm/sec, 10-3 cm/sec, 10-4 cm/sec) and separation distance (10 m, 50 m, 100 m). Groundwater drawdown at the monitoring well was increased as the hydraulic conductivity decreased and the separation distance increased. From the regression analysis of groundwater drawdown as a hydraulic conductivity at the same separation distance, it was found that the groundwater level fluctuation of artificial recharge aquifer was dominantly influenced by hydraulic conductivity. In the condition that the hydraulic conductivity of artificial recharge aquifer was 10-2 cm/sec or more, the radius of influence of groundwater level was within 20 m, but In the condition that the hydraulic conductivity is 10-3 cm/sec or less, it is confirmed that the radius of influence of groundwater increases sharply as the separation distance increases.
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KEYWORD
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Facility agricultural complex, Artificial recharge, HydroGeoSphere modeling, Sensitivity analysis, Hydraulic conductivity, Separation distance
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