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Statistical Approach to River–Aquifer Interaction in the Lower Nakdong River Basin, Republic of Korea

The construction of river barrages has led to an increase in groundwater (GW) levels (WL_G) near the upstream regions of these barrages, particularly in the wet season. Statistical approaches were applied in this study to examine the relationships between WL_G and river water (RW) level (WL_R), and electrical conductivity of groundwater (EC_G) and electrical conductivity of river water (EC_R) in the Changnyeong–Haman river barrage area located downstream of the Nakdong River for the period June 2011–January 2014. Our finding suggested that the WL_G increased and the concentrations of most chemical constituents in the GW decreased in the study area owing to the construction of the barrage. However, long‐term operation of the barrage is expected to trigger a decrease in the RW–GW interaction resulting from the clogging of the bed and the wall of the river, which would in turn increase GW contamination. Copyright © 2016 John Wiley & Sons, Ltd.