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Use of time series analysis for the identification of tidal effect on groundwater in the coastal area of Kimje, Korea |
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| Authors: | Ji-Hoon Kim Jeongho Lee Tae-Jin Cheong Rak-Hyeon Kim Dong-Chan Koh Jong-Sik Ryu Ho-Wan Chang |
| Institution: | a Petroleum and Marine Resources Research Division, Korea Institute of Geoscience and Mineral Resources, Daejeon 305-350, South Korea b Environmental Impact Assessment Division, Korea Environment Institute, Seoul 122-706, South Korea c School of Earth and Environmental Sciences, Seoul National University, Seoul 151-742, South Korea d Groundwater Resources Group, Korea Institute of Geoscience and Mineral Resources, Daejeon 305-350, South Korea e Isotope Research Team, Korea Basic Science Institute, Daejon 305-333, South Korea |
| Abstract: | The purpose of this study is to apply time series analysis to investigate whether the groundwater quality in the coastal area is affected by the tide. Continuous and regular in situ monitoring data of electrical conductivity (EC) and groundwater level, and tidal level data measured by the National Oceanographic Research Institute were used for the time series analysis. Through the time series analysis, it is known that EC and groundwater level conspicuously fluctuate with two periodicities (15.4 and 0.52-day), which is very similar to those of the tide. Also the behaviors of their fluctuations vary in accordance with the tidal period. These indicate that the groundwater quality has been mainly controlled by the tidal level, and the strength of tidal effect on the groundwater quality is different according to the tidal period. |
| Keywords: | Tidal effect Periodicities Time series analysis Correlation Groundwater quality |
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