Fig. 4

Variation in flood duration from 1997 to 2022: A overall bottomlands downstream from the dam; B–D bottomlands in the Dongting Lake area, Poyang Lake area, and Anhui section, respectively
Variation in flood duration from 1997 to 2022: A overall bottomlands downstream from the dam; B–D bottomlands in the Dongting Lake area, Poyang Lake area, and Anhui section, respectively