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Analysis of Groundwater Discharge into the Geumjeong Tunnel and Baseflow Using Groundwater Modeling and Long-term Monitoring
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 Title & Authors
Analysis of Groundwater Discharge into the Geumjeong Tunnel and Baseflow Using Groundwater Modeling and Long-term Monitoring
Cheong, Jae-Yeol; Hamm, Se-Yeong; Yu, Il-Ryun; Whang, Hak-Soo; Kim, Sang-Hyun; Kim, Moon-Su;
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 Abstract
When constructing tunnels, it is important to understand structural, geological and hydrogeological conditions. Geumgeong tunnel that has been constructed in Mt. Geumjeong for the Gyeongbu express railway induced rapid drawdown of groundwater in the tunnel construction area and surroundings. This study aimed to analyze groundwater flow system and baseflow using long-term monitoring and groundwater flow modeling around Geumgeong tunnel. Field hydraulic tests were carried out in order to estimate hydraulic conductivity, transmissivity, and storativity in the study area. Following the formula of Turc and groundwater flow modeling, the annual evapotranspiration and recharge rate including baseflow were estimated as 48% and 23% compared to annual precipitation, respectively. According to the transient modeling for 12 years after tunnel excavation, baseflow was estimated as with a decreasing tendency.
 Keywords
Groundwater modeling;Long-term monitoring;Baseflow;Geumjeong tunnel;Groundwater discharge;
 Language
Korean
 Cited by
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