Environment of Azerbaijan
The Caspian Sea is the largest lake on Earth by both area and volume, with a surface area of 371,000 square kilometres (143,244 mi²) and a volume of 78,200 cubic kilometres (18,761 mi³). It is a landlocked endorheic body of water and lies between Asia and Europe. It has a maximum depth of about . It is called a sea because when the Romans discovered it they tasted the water and found it to be salty. It has a salinity of approximately 1.2 percent, about a third the salinity of sea water.
Azerbaijan
The main water sources are surface waters. However, only 24 of the 8,350 rivers are greater than in length. All the rivers drain into the Caspian Sea in the east of the country. The largest lake is Sarysu (67 km²), and the longest river is Kur (1,515 km), which is transboundary with Armenia. Azerbaijan's four main islands in the Caspian Sea have a combined area of over thirty square kilometers.