From 67 to 0999, the Meiyu period in Taihu Lake Basin lasted for 43 days, and the average total amount of Meiyu in the basin was 670mm, which was three times that of normal years, causing the catastrophic flood in the basin since this century. The average continuous maximum rainfall of 7d, 15d, 30d, 45d, 60d and 90d exceeds the measured maximum of historical rainstorm, approaching or exceeding the once-in-a-century period.

West Zhejiang, Lake District, Hangjiahu District, Pudong and Puxi District are obviously larger than West Lake District and West Wucheng District, and the highest water level in Taihu Lake reaches 5.08m, which is 0.29m 199 1 year, enriching people's understanding of rainfall characteristics in the Great Lakes basin.

It also urges the author to further consider a series of issues, such as the rational scheduling of key projects in the river basin, the relationship between storage and discharge of flood control in the river basin, the relationship between flood control in the river basin and regional drainage, and the focus of the next flood control planning in progress.

Extended data

According to the introduction of Yixing Flood Control Office, historically, during the flood of 1999, the highest water level in Yixing was 5.29 meters. This historical record was rewritten after 17. At 3: 40 pm on July 2, the water level in Yixing city exceeded 5.29 meters, and then the water level continued to rise until it reached a record high of 5.55 meters on July 5.

This record means that many rivers in Yixing's cities and villages have become suspended rivers, and the rising water level has caused floods to overflow dikes and flooded nearby communities, factories and farmland.

China Net-Yixing Taihu Basin Flood Control Dilemma: The high-level flood in Taihu Lake is difficult to discharge.

Thoughts on HowNet-Taihu Basin 1999 Extraordinary Flood and Flood Control Planning