Uncertainties lying on the groundwater age-dating in a highly-utilized and fractured-rock aquifer system

YeoJin Ju, Seoul National University, Seoul, Korea, Republic of (South), Dugin Kaown, Seoul Nation Univ, Seoul, Korea, Republic of (South), Arash Massoudieh, Catholic University of America, Washington, DC, United States and Kang Kun Lee, Seoul National University, Seoul, South Korea