Biggest Flood Control in the world

Three Gorges Reservoir	Three Gorges Reservoir

Although the TGP Reservoir is not the reservoir with the biggest capacity in the world, its reserved flood control capacity can help cut flood peak by 27,000 ～ 33,000 m3/s, the biggest for a water conservancy project in the world.
When the TGP is completed, the flood control standard of the middle and lower reaches of the Yangtze, especially the Jingjiang Section, will be largely upgraded from the present level of preventing under-10-year floods to that of preventing 100-year floods. So 15 million people and 1.5 million hectares of farmland in the Jianghan Plain are relieved from flood threats, and devastating plagues of massive death caused by big floods are avoided
Floods records of Yangtze River (1931, 1935, 1949)
1931:
The flood in 1931 struck an area of 130,000 km2 with 3.39 million ha farmland and 1.8 million houses inundated, 28.55 million people affected, and 145,000 people killed, causing approximately an economic loss of 1.345 billion YinYuan.
1935:
 The flood in 1935 hit an area of 89,000 km2 in the middle and lower reaches of the Yangtze River, with six provinces, Hubei, Hunan, Jiangxi, Anhui, Jiangsu, Zhejiang and 10 million people affected, 1.51 million ha of farmland inundated, 142,000 people killed, causing approximately an economic loss of 0.355 billion YinYuan
1949:
 The flood in 1949 inundated 1.81 million ha farmland, affected 8.1 million people and cost the lives of 5699 people in the middle and lower reaches of the Yangtze River.