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학술저널
저자정보
Cheong, Jae-Yeol (Korea Radioactive Waste Agency) Hamm, Se-Yeong (Division of Earth Environmental System, Pusan National University) Koh, Dong-Chan (Korea Institute of Geoscience and Mineral Resources) Lee, Chung-Mo (Division of Earth Environmental System, Pusan National University) Ryu, Sang Min (Division of Earth Environmental System, Pusan National University) Lee, Soo-Hyoung (Korea Institute of Geoscience and Mineral Resources)
저널정보
대한지질공학회 The Journal of Engineering Geology 지질공학 제26권 제1호
발행연도
2016.1
수록면
1 - 13 (13page)

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Groundwater flow paths and groundwater ages at a radioactive waste repository located in a coastal area of South Korea were evaluated using the hydrochemical and hydrogeological characteristics of groundwater, surface water, rain water, and seawater, as well as by numerical modeling. The average groundwater travel time in the top layer of the model, evaluated by numerical modeling and groundwater age (34 years), approximately corresponds to the groundwater age obtained by chlorofluorocarbon (CFC)-12 analysis (26-34 years). The data suggest that the groundwater in wells in the study area originated up-gradient at distances of 140-230 m. Results of CFC analyses, along with seasonal variations in the δ<sup>18</sup>O and δD values of groundwater and the relationships between <sup>222</sup>Rn concentrations and δ<sup>18</sup>O values and between <sup>222</sup>Rn concentrations and δD values, indicate that groundwater recharge occurs in the summer rainy season and discharge occurs in the winter dry season. Additionally, a linear relationship between dissolved SiO<sub>2</sub> concentrations and groundwater ages indicates that natural mineralization is affected by the dilution of groundwater recharge in the rainy summer season.

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