Ayeyarwady River

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Map of the Ayeyarwady Watershed

The Ayeyarwady River or Irrawaddy River (Burmese: ဧရာဝတီမ္ရစ္; MLCTS: ei: ra wa. ti mrac) is a river that flows through Burma (Myanmar). It is Myanmar's largest river (about 1350 miles or 2170 km long) and its most important commercial waterway, with a drainage area of about 158,700 square miles (411,000 km²).

Temporary farming settlements on islands of Ayeyarwady River
Temporary farming settlements on islands of Ayeyarwady River

The Ayeyarwaddy River starts in Kachin State, at the confluence of the Mali Hka and N'Mai Hka rivers. The western Mali Hka branch arises from the end of the southern Himalayas, north of Putao, and (like the main river) is called Nam Kiu in the Shan language.

Built in 1934, the Ava Bridge near Sagaing, Myanmar was the only bridge over the Ayeyarwady (Irrawaddy) River until 1998.
Built in 1934, the Ava Bridge near Sagaing, Myanmar was the only bridge over the Ayeyarwady (Irrawaddy) River until 1998.

The Ayeyarwaddy River bisects the country from north to south and empties through a nine armed delta into the Indian Ocean. In colonial times, before railways and automobiles, the river was known as the "Road to Mandalay". Although navigable by large vessels to Myitkyina for a distance over 1600 km from the ocean, the river is also full of sandbanks and islands, making such navigation difficult. For many years, the only bridge built to cross the Ayeyarwady River was the Inwa Bridge.

The names Irrawaddy and Ayeyarwady are believed to have derived either from the Sanskrit name Iravati, a sacred river and minor goddess in Indian mythology, or from her son Airavata, the elephant mount of Indra.

The Irrawaddy gives its name to a dolphin, the Irrawaddy dolphin (Orcaella brevistosus), which is found in the river. Though sometimes called the Irrawaddy River Dolphin, it is not a true river dolphin, since it is also found at sea.

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