Нактонган
The amount of water secured by the four major rivers project is 1.30 billion m3, and plans to secure 1.02 billion m3 of water from the Nakdong River by 2012. Although the residual water in the Nakdong River area is already developed, it is not calculated by region. But it can be used in regions where there is not enough water remaining in the region in an appropriate way. Therefore, it is appropriate to calculate the amount of water deficit by area calculated on the assumption that surplus water quantity can be supplied to the adjacent area after calculation of oversize and abundance by 33 areas (33 subwatersheds) of Nakdong River. Therefore, in the Nakdong River area, it is estimated that 0.11 billion m3 of water will remain in 2011 and 201 billion m3 of water will be lacking in 2016. In this situation, the plan to secure 1.02 billion cubic meters of water from the Nakdong River area as a project to restore the four rivers should be fully reviewed.