In 2006, the Yangtze River experienced an exceptionally low flow, impacting water usage and the environment. By analyzing runoff and weather data, researchers found that the low discharge was mainly caused by a significant loss of water during the flood season. The decrease in water flow was most severe in August and September, with reductions of over 50%. The lack of precipitation and high temperatures in the upper reaches of the river were the main reasons for the low discharge. Water storage at the Three Gorges Project also played a role in reducing water flow at certain hydrological stations. Overall, the study highlights the complex factors contributing to the exceptional low flow in the Yangtze River in 2006.