The study looked at how the Three Gorges Project affects water flow and sediment in Dongting Lake. They found that after 50 years of the project, there will be less water and sediment flowing into the lake. This decrease will help reduce sediment buildup in the lake, which is good for its health. However, the project's schedule will cause water levels to drop during flood season, which is good for preventing floods but bad for the environment in dry seasons.