From the needs of the people. And the authorities will let the Northeast have irrigation schemes in the central and northern regions, so the government ordered the Royal Irrigation Department to open irrigation in this sector. The survey of water and terrain has been carried out for the project since 1934 and construction work has been carried out to solve the problem of the people's demands since 1939 onwards.
Most of this irrigation works. Focusing on the construction of reservoir projects. And the transmission system to distribute water throughout the sector. The construction of seven large irrigation projects increased from 1963 to 1970, including Lam Ta Khong Lam Ta Khong Dam Project Nakhon Ratchasima Province Lam Pao Project Kalasin Province Nam Phong Project Khon Kaen Water Project Sakon nakonn Little dome project Ubon Ratchathani and Huay Luang, Udonthani Province, until 1975. There are 170 reservoirs and irrigation projects completed in this area, with a total area of approximately 1.5 million rai for irrigation and maintenance. It has begun to play an increasingly important role. The Irrigation User Association was established in the completed irrigation project. In order for farmers benefiting from irrigation projects to participate in the maintenance and sharing of water fairly. For the project Big construction After building the head and building. Some irrigation is finished. The Royal Irrigation Department has approved the establishment of a water supply and maintenance project for irrigation management and maintenance.
In 1975, the Royal Irrigation Division was reconsidered. There are 3 offices in the Northeast, namely, Irrigation Office 4, 5 and 6, which are named as RIO4, RIO5 and RIO6. Heads of Irrigation Office (Later renamed Director of Irrigation Office).
RIO4 is responsible for irrigation in the areas of Khon Kaen, Udon Thani, Nong Khai, Loei and Mahasarakham. The five provinces are located in Amphoe Muang. Khon Kaen
RIO5 is responsible for irrigation in Ubon Ratchathani, Yasothon, Roi Et, Kalasin, Sakon Nakhon, Nakhon Phanom, Mukdahan, Amnat Charoen and 8 provinces. Ubon Ratchathani
Subsequently, the 5th irrigation office changed its name to Irrigation Office 7 is responsible for 5 provinces including Ubon Ratchathani, Yasothon, Amnat Charoen, Mukdahan and Nakhon Phanom.
RIO6 is responsible for irrigation in Nakhon Ratchasima, Chaiyaphum, Surin, Buriram and Sisaket provinces. The total area is about 38 million rai, located in Amphoe Muang. Nakhon Ratchasima