The largest lake in the Lower Amur floodplain. Its area is 338 square kilometers, length 58 kilometers, maximum width 23 kilometers, maximum depth up to 4 meters. 51 rivers flow into the lake, the largest rivers are Simmi and Kharpi. The Siy River flows out, connecting the lake with the Amur. Area: 323,60001 sq. km., volume: 4030,05 cubic meters, depth avg: 12,5 m, shore length: 148,83 m, res time: 191,2, elevation: 16