Biggest Flood Control Benefit in the World
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, 1954, and 1998)
||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.
||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.
||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.
||The damages caused by the flood in 1954 in the middle and lower reaches: totally 3.18 million ha farmland and 4.27 million houses inundated, 18.884 million people and 123 counties and cities affected, 33169 people killed and the interruption of the Beijing-Guangzhou Railway for 100 days.
||The flood in 1998 struck a large area of the Yangtze Valley. The country went all out to fight against the flood for nearly 3 months with large quantities of people and materials employed. More than RMB 13 billion worth of flood-fighting materials were dispatched from all around the country, and about 6.7 million people and hundred thousands of soldiers took part in the fighting. However, the flood still caused great losses with 239,000 ha farmland inundated, 2.316 million people affected and 1526 people killed in the four provinces of Hunan, Hubei, Jiangxi and Anhui.