## 4 Conclusions  
In this study, termination criteria at each drought response stage were applied to the Hapcheon Dam (South Korea) as a part of non-structural measures to secure an additional volume of water for stable water supply in multi-purpose dams during drought. To this end, we conducted a simulation by using the values of the dam inflow, calculated through 52 RCP 4.5/8.5 GCMs of IPCC AR5. Of the applied GCMs, four GCMs with lower reliability values and one GCM with the median value were selected, and the applicability of the termination criteria at each drought response stage was evaluated through the calculation of the water supply capacity. Our study demonstrated several important findings. First, the inflow values of future climate change scenarios were obtained by the simulation through PRMS with 52 AR5 RCP4.5/8.5 GCMs as input. The time reliability and supply reliability were calculated with the application of the termination criteria at each drought response stage, and the results were ranked and classified. Interestingly, of the 52 GCMs, 47 GCMs showed time reliability of \(\geq\)90%, while 51 GCMs showed supply reliability of \(\geq\)90%. Second, we selected four GCMs with lower time reliability, and one GCM with median values was selected. Then, the time reliability, supply reliability, resiliency, and vulnerability were calculated to estimate the water supply capacity. For both time reliability and supply reliability, the CMCC-CMS(RCP4.5) model yielded the lowest values of 65.6% and 79.9%, respectively. Meanwhile, the resiliency and vulnerability analysis showed that the INM-CM4(RCP8.5) model yielded values of 86.7 days and 79.6 million m\({}^{3}\), respectively. Third, of the selected GCMs, the volume of additional water supply generated by applying the termination criteria at each drought response stage compared to the water supply under the existing multi-purpose dam operation standard was calculated. Subsequently, the number of days for water service availability for residential and industrial water and water for residential, industrial, and agricultural use and river maintenance was quantified, corresponding to the volume of additional water supply. It was found that the CMCC-CMS(RCP4.5) model exhibited the lowest time reliability and supply reliability. Interestingly, it yielded the largest volume of additional water supply at 74.15 million m\({}^{3}\), which corresponds to 52.0 days of water supply for residential and industrial use and an additional 47.7 days of water supply for residential, industrial, and agricultural use and river maintenance. Moreover, the other GCMs also yielded an increase in the volume of additional water supply and the number of days for water supply availability when  
\begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multicolumn{2}{c}{**Additional Supply**} & \multicolumn{1}{c}{**CMCC-**} & \multicolumn{1}{c}{**IPSL-CM5A-**} & \multicolumn{1}{c}{**INM-**} & \multicolumn{1}{c}{**MIROC-**} & \multicolumn{1}{c}{**CMSM4(RCP4.5)**} \\ \multicolumn{2}{c}{**(Days)**} & \multicolumn{1}{c}{**CMS(RCP4.5)**} & \multicolumn{1}{c}{**MR(RCP8.5)**} & \multicolumn{1}{c}{**CM4(RCP8.5)**} & \multicolumn{1}{c}{**ESM(RCP8.5)**} & \multicolumn{1}{c}{**(Median)**} \\ \hline \multirow{4}{*}{**Total Period**} & Water for residential and industrial use & \multirow{2}{*}{52.0 days} & \multirow{2}{*}{11.1 days} & \multirow{2}{*}{10.1 days} & \multirow{2}{*}{7.0 days} & \multirow{2}{*}{8.1 days} \\  & Water for residential, industrial, and & & & & & \\  & agricultural use and river maintenance & \multirow{2}{*}{47.7 days} & \multirow{2}{*}{10.2 days} & \multirow{2}{*}{9.3 days} & \multirow{2}{*}{6.5 days} & \multirow{2}{*}{7.4 days} \\  & & & & & & \\  &  
the termination criteria at each drought response stage were applied, compared to the application of the existing standard of multi-purpose dam operation. Finally, we evaluated the applicability of the termination criteria at each drought response stage in multi-purpose dams. To this end, we used climate change scenarios.