River systems of Thailand divides into two major branches, the " Tiền Giang" (Front River) and "Hậu Giang" (Back River). These in turn enter the South China Sea through nine estuaries. The following are the principal tributaries of Mekong River which flow through Thailand (tributaries entirely outside the Thai border not shown). The Mekong drains a considerable portion of northeast Thailand. In terms of Thai territory drained, it is second only to the Chao Phraya system. The Salawin River rises in Tibet (Tibetan: རྒྱལ་མོ་རྔུལ་ཆུ།) after which it flows through Yunnan, where it is known as the "Nujiang" River (), although either name can be
River Waveney River Waveney The Waveney is a river which forms the boundary between Suffolk and Norfolk, England, for much of its length within the Broads. The source of the River Waveney is a ditch on the east side of the B1113 road between the villages of Redgrave, Suffolk and South Lopham, Norfolk. The ditch on the other side of the road is the source of the River Little Ouse which continues the county boundary and, via the Great Ouse, reaches the sea at King's Lynn. It is thus claimed that during periods of heavy rainfall Norfolk can be considered to be