In the present study, an integrated SWAT-MODFLOW model was implemented to analyze the method of supplying groundwater
abstraction contributing to Musimcheon stream. Various simulations of supply of groundwater to streamflow with current and
maximum groundwater abstraction have been explored for 5 years (2011-2015). In 2015, when the severe drought happened, the
monthly discharge change rate due to groundwater supply was ranged from 23% in current abstraction to 68% in maximum abstraction.
In terms of annual groundwater recharge, these quantities could be applicable recharges ranged from 75 mm (6.2% of annual mean
precipitation) to 290 mm (24% of annual mean precipitation) which could be stable annual supply. Since surface water is vulnerable to
drought, the water supply using groundwater could be an effective alternative for stream deficiency.