1On August 8th, 975, in a rainstorm, two large reservoirs, including Banqiao Reservoir and Shimantan Reservoir, two medium-sized reservoirs, dozens of small reservoirs and two flood storage and detention areas broke down one after another in just a few hours, making Zhumadian, Henan Province suddenly criss-cross ravines and rivers, killing tens of thousands of people.
1In August, 1975, affected by the rainstorm brought by super typhoon Lenore, dozens of reservoirs in Zhumadian, Henan Province, including two large reservoirs, experienced roof overflow and dam break.
The dams of Shimantan and Tiangang Reservoir burst, the Li River burst, the flood peak of the basin pressed the whole Zhumadian, and the flood storage area of Laowangpo burst one after another. On August 8 1, Banqiao Reservoir in Zhumadian area burst its overflow, with a flood of more than 600 million cubic meters and a flood peak more than 50 feet high roaring down. At the same time, Zhugou medium-sized reservoir burst, Boshan reservoir overflowed, and 58 small reservoirs burst one after another in just a few hours.
In 29 counties and cities of Henan Province, 1 1 10,000 people were affected, with heavy casualties. 170,000 mu of farmland was flooded, including 1 1 10,000 mu of farmland, 5.96 million houses collapsed, 302,300 farm animals and 720,000 pigs were washed away.