10. Smallwood Reservoir
Volume: 32.64km3 (36th)
Surface Area: 6,527 km2 – 2,520 sq mi (2nd)
The Smallwood Reservoir, unlike most manmade lakes in the world, isn’t created by a dam, but rather by 88 dikes spanning 64 kilometers in total length. It’s second manmade reservoir in the world by surface area, but only 36th by water volume.