Waterlevel (m) Surface area (km2) 4.6 50000 4.5 300000 4.2 730000 4 1860000 3.7 11330000 3.5 24760000 3.2 53410000 3 82560000 2.7 95860000 2.5 110170000 2.2 119440000 2 131610000 1.7 141210000 1.5 153460000 1.3 161390000 1 181730000 0.8 191300000 0.5 217490000 0.3 233950000 0.2 246770000 0 271520000 -0.5 2.74E+08 -1 2.76E+08