The most prominent physical feature of Armenia is Lake Sevan, one of the world's largest mountain lakes, which covers 5% of the area of the republic. The Hrazdan River flowing out of the lake is used for both power generation and irrigation. The lake level has been dropping because of excessive outflow of water, and a 48-km(30mi) diversion tunnel has been built(completed 1979) from the nearby Arpa River to supply additional water inflow.
Armeni is a producer of copper and molybdenum, which are mined in the Kadzharan area, and of gold, which is mined in the Zod area, near the east end of Lake Sevan. The chemical industry is concentrated in Yerevan mostly. A nuclear power station, opened in 1976, contributes much of the electricity. The agriculture specializes in vineyards, fruits, tobacco, and essential oils.
More precisely, historical Armenia lies between 38 degrees and 48 degrees latitude north and 37 degrees and 41 degrees longitude east. It covers a surface area of over 230,000 square miles, considerably more than France. Present- day Armenia covers about 11,500 square miles.
Although the features of the land are rather rough and uneven, its outstanding physical aspect is its tableland, with the true "Armenian plateau" lying from 3,300 to 6,500 feet above sea level to the north east, beside the 2,500 foot Anatolian plateau and the Iranian plateau, which is from 2,000 to 5,000 feet above sea level. These vast plateaux are marked by a series of mountains:the great, isolated horns of Mount Ararat comprising the peaks of Great Ararat(16,945 feet) and the Little Ararat(12,887 feet)-the Aragats(13,224 feet).