Changes in Stream–Aquifer Interactions Due to Gate Opening of the Juksan Weir in Korea

The Juksan weir, installed in the Yeongsan river South Korea from 2010 to 2012, has secured sustainable water resources and helped control flooding. However, low flow velocities due weir have deteriorated quality of water. For natural restoration, gate was opened 2017. In this study, three-dimensional finite difference model Visual MODFLOW used analyze effects opening on stream–aquifer interactions. A conceptual developed simulate dynamics caused by operation at weir. Groundwater data were also analyzed determine impacts operations groundwater quality. Our results indicate that a lower level changed flow, which then affected balance. change increased variability had homogenized because induced recharge after construction This could affect use agricultural areas near Therefore, further monitoring hydrodynamic analyses are required anticipate address any potential issues.