The Mekong River in cambodia

Mekong River has its source in China and flows down to Myanmar , Thailand , Laos , Cambodia and Vietnam . It crosses Cambodia from the North to the South about 600khs. At Phnom Penh , the Mekong river bursts in to 4 branches: the Upper Mekong, the Lower Mekong (Tonle Bassak), Tonle Sap and dry season the water reverses direction and flows back to Mekong and flows to the sea.