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
Jaú River (Amazonas) of the Rio Negro.. The Carabinani, which flows north to enter the Jaú River a few kilometres before that river enters the Rio Negro, forms the boundary between the Jaú National Park and the Rio Negro State Park North Section. The last section of the Jaú between the Carabinani and its mouth on the Rio Negro continues the boundary between the two parks. Jaú River (Amazonas) Jaú River () is a river of Amazonas state in north-western Brazil. It is a tributary of the Rio Negro, which itself is a tributary of the Amazon River. The name "Jaú" comes from