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 China Sea East China Sea The East China Sea is a marginal sea east of China. The East China Sea is a part of the Pacific Ocean and covers an area of roughly . To the east lies the Japanese islands of Kyushu and the Ryukyu Islands, to the south, lies the South China Sea, and to the west by the Asian continent. The sea connects with the Sea of Japan (East Sea) through the Korea Strait and opens to the north into the Yellow Sea. The countries which border the sea include Japan, Taiwan and China. The East China Sea is