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Analyzing Spatio-Temporal Variation of Groundwater Recharge in Jeju Island by using a Convolution Method
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 Title & Authors
Analyzing Spatio-Temporal Variation of Groundwater Recharge in Jeju Island by using a Convolution Method
Shin, Kyung-Hee; Koo, Min-Ho; Chung, Il-Moon; Kim, Nam-Won; Kim, Gi-Pyo;
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Temporal variation of groundwater levels in Jeju Island reveals time-delaying and dispersive process of recharge, mainly caused by the hydrogeological feature that thickness of the unsaturated zone is highly variable. Most groundwater flow models have limitations on delineating temporal variation of recharge, although it is a major component of the groundwater flow system. A new mathematical model was developed to generate time series of recharge from precipitation data. The model uses a convolution technique to simulate the time-delaying and dispersive process of recharge. The vertical velocity and the dispersivity are two parameters determining the time series of recharge for a given thickness of the unsaturated zone. The model determines two parameters by correlating the generated recharge time series with measured groundwater levels. The model was applied to observation wells of Jeju Island, and revealed distinctive variations of recharge depending on location of wells. The suggested model demonstrated capability of the convolution method in dealing with recharge undergoing the time-delaying and dispersive process. Therefore, it can be used in many groundwater flow models for generating a time series of recharge.
Jeju island;Groundwater recharge;Unsaturated zone;Convolution method;
 Cited by
예비 과학교사들의 암석에 대한 이해수준에 따른 육안분류 능력,박경진;조규성;

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