The research studied changes in irrigation water availability due to climate change in South Korea. By analyzing data from agricultural reservoirs and climate scenarios, the researchers identified when paddy fields might face water shortages. They found that under certain future climate scenarios, the duration of vulnerable irrigation seasons increased significantly compared to the past. The findings suggest that in the late 21st century, there could be longer periods where paddy fields might not have enough water for irrigation. The study's approach helps predict when these water shortages might occur so that reservoirs can be managed more effectively to support agriculture despite climate change.