5. Northeast Plateau area. Terrain to the north-east are separated. From Northern and Central markedly since the lifting of the western and southern edges, causing steep mountains along the western side of Phetchabun. To the south it is bordered by steep hills and Phanom Dong Rak Chiang Mai in the middle of the field, this looks like the bottom of a trough pan called Korat Chi River basins and river flow. There are also a number of open plains like a hungry dog Kularonghai field Phu Phan mountain range spanning. Long curved slightly to the northeast of the region. Next to it from the Phu Phan mountain range to the north, a trough of low collapses. Sakon basin of land that results in many areas, has become like a swamp in Nong Han district. Sakon Nakhon, Nong Prajak of Thailand. Udon Thani, Nong relatives in Thailand. Phanom, the plateau will be lifted high in the west and the south. And slanting to the Southeast into the Mekong River. Major rivers that flow through the plateau. Northeast Chi River is the river and a few branches. Which runs from west To the east of the Mekong River