This report summarizes the findings of investigations and studies conducted through fieldtrips and an opinionnaire over a period of 11 months from July 1978 to May 1979 on various problems involved in hydraulic and hydrological phases of 12 large-scale comprehensive agricultural development project, Pyeongtaek-Kumgang, 1st stage and 2nd stage of Yongsangang, Kyungju, Gyehwado, Sapgyocheon, Imjin, Changryung, Miho, Namgang and Nakdonggang which are either completed or imdrocess of implentation for rural modernization in Korea.