The Rivers and lakes in Armenia are mainly powered by fresh water. Throughout history Armenia has been called Nairi by the Assyrians meaning the "Land of the lakes and rivers". The Armenia is home to many rivers and lakes.
Armenia has one very large lake called Lake Sevan and more than 100 small mountain lakes. None of them, except Sevan and Lake Arpi, have yet been extensively studied. The water resources of the lakes amount to about 39,300 million cu m, Sevan holding most of this, nearly 39,000 million cu m (before the drainage it had almost 58,000 million cu m).