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http://dx.doi.org/10.5322/JESI.2015.24.12.1691

Analysis of Groundwater Discharge into the Geumjeong Tunnel and Baseflow Using Groundwater Modeling and Long-term Monitoring  

Cheong, Jae-Yeol (Korea Radioactive Waste Agency)
Hamm, Se-Yeong (Division of Earth Environmental System, Pusan National University)
Yu, Il-Ryun (Division of Earth Environmental System, Pusan National University)
Whang, Hak-Soo (Ilshin Engineering)
Kim, Sang-Hyun (Department of Environmental Engineering, Pusan National University)
Kim, Moon-Su (Soil and Groundwater Division, National Institute of Environmental Research)
Publication Information
Journal of Environmental Science International / v.24, no.12, 2015 , pp. 1691-1703 More about this Journal
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 $9,796-9,402m^3/day$ with a decreasing tendency.
Keywords
Groundwater modeling; Long-term monitoring; Baseflow; Geumjeong tunnel; Groundwater discharge;
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Times Cited By KSCI : 4  (Citation Analysis)
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