Moei River The Moei River forms the border between Thailand and Burma. The river is the scene of clashes between the Tatmadaw and Karen militias. Often Karen people cross the river either in order to enter Thailand as refugees or to go back to Burma. Moei River The Moei River (, , , ) is a tributary of the Salween River. Unlike most rivers in Thailand, the Moei River flows north in a northwest direction. It originates in Phop Phra District, Tak Province, flowing then from south to north across Mae Sot, Mae Ramat, and Tha Song Yang Districts, finally entering the
Tapi River, Thailand Tapi River, Thailand The Tapi (or Tapee) river (, , ) is the longest river in southern Thailand. The river originates at Khao Luang mountain in Nakhon Si Thammarat Province, and empties into the Gulf of Thailand at Bandon Bay near the town of Surat Thani. It has a length of . The river drains an area of and in 1997 had a yearly discharge of or per year. The Phum Duang River (or Khiri Rat River), which drains another west of the Tapi watershed, joins the estuary west of Surat Thani in Amphoe Phunphin. The river was named on