Enns (town) are used for agriculture. The municipality can be subdivided into the districts of Einsiedl, Enghagen, Enghagen am Tabor, Enns, Ental, Erlengraben, Hiesendorf, Kottingrat, Kristein, Kronau, Lorch, Moos, Rabenberg and Volkersdorf. The first settlements in the area of the mouth of the Enns river to the Danube date back to 4,000 years ago. Celts settled the land around 400 BC. Their kingdom of Noricum was incorporated into the Roman Empire in AD 15 and was designated as a Roman province under the reign of Emperor Claudius in AD 45. In the second and third century, the Roman camp of "Lauriacum", in
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