Evaluation of measurement methods for assessing vertical velocity in groundwater systems: a case study from Osongji (Osong Pond), Jeonju-si, South Korea. - Ko, Hye-Na; Oh, Seoyeong; Hyun, Yunjung; Hwang, Hyoun-Tae; Lee, Kang-Kun; Jeen, Sung-Wook (Environmental Earth Sciences, 2025)