PRE-INVESTMENT SURVEY OF THE NAKTONG RIVER BASIN, Taegu, Korea, December 1968. An integrated survey of the Naktong River Basin is now underway by the Korean Government and the UNited Nations Development Programme-special Fund (UNDP-SF), with the Food and Agriculture Organization (FAO) as executing agency. Detailed investigations of the land and water resources of this area are being carried out by ptoject personnel . A korean farmer gathering his crop of sweet potatoes.