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
Siberian natural resources 10 barrels, or 42 gallons, depending on the density) Table of Total production (for 45 oil well areas) The most important Siberian petroleum zones are the West Siberian petroleum basin, Central Urals, Sakhalin Island, Nordvyl on the Arctic Siberian coast, and the Kamchatka peninsula. From the Caspian Sea there is one oil pipeline, which continues to the petrol camps of Emba at Orsk and ends in Omsk, in western Siberia. Sakhalin Island has the most important oil reserves in the Russian Far East. In 1936, the Ohka oil wells extracted about 470,000 tonnes; one-third were obtained for Japanese concessionaires. In