Abstract: In this study, the termination criteria at each drought response stage were shown to increase
storage volume while maintaining the stability of the water supply service during drought in multipurpose
dams. For 52 of the Representative Concentration Pathway (RCP) 4.5/8.5 scenarios of the
IPCC (Intergovernmental Panel on Climate Change) fifth assessment report (AR5), dam inflows
were calculated through the precipitation-runoff modeling system (PRMS), and time reliability and
supply reliability were estimated. Moreover, given the application of termination criteria at each
drought response stage, the volume of additional water supply was calculated, while the number
of days for additional supply availability of water for residential and industrial use and water for
residential, industrial, and agricultural use and river maintenance was quantified as well. The CMCCCMS(
RCP4.5) GCM exhibited the largest volume of additional water supply at 74.15 million m3,
which corresponds to 52.0 days of water for residential and industrial use and to 47.7 days of water
for residential, industrial, and agricultural use and river maintenance. The analysis revealed that the
volume and the number of days of additional water supply also increased for other GCMs due to the
application of termination criteria at each drought response stage.