Nam Nao National Park forest area is cold water barrier between the east and the north of the area generally. The mountains stretch through Chaiyaphum. And Phetchabun. Phu Kum Khao Phu particular meta and surrounding mountains make up the forest watershed. The origins of the stream length as Passage River Mae Nam Phong river Huai Huai Kaen heard water flowing into the dam problem which Ubolrat. And Chulabhorn.