East Siberian Sea runoff into the East Siberian Sea is relatively small at about 250 km/year that makes only 10% of the total runoff in all the Arctic seas of Russia. The largest contribution is from the Kolyma River at 132 km, followed by the Indigirka River at 59 km. Most runoff (90%) occurs in summer; it is concentrated near the coast, owing to the weak river currents, and therefore does not significantly affect the sea hydrology. The water exchange between the neighboring seas is as follows. The annual outflow to the Laptev Sea, Chukchi Sea and Arctic Ocean is 3,240, 6,600 and
East Siberian Sea been abandoned. Nowadays, Ambarchik only hosts a meteorological station operated by a few staff members. Another two labour camps of the Gulag system were later opened near Pevek, namely Chaunlag (1951–1953) and Chaunchukotlag (1949–1957). Both contained about 10,000 inmates used in the mine and construction works. The southern coast of the sea is shared by the Sakha Republic on the west and Chukotka Autonomous Okrug of Russia on the east. The coastal settlements are few and small, with the typical population below 100. The only city is Pevek (population 5,206), which is the northernmost city in Russia. There are gold