The study looked at pollution levels in Lake Poyang from 2008 to 2012. They measured the amounts of different pollutants coming in and going out of the lake, like phosphorus and ammonia. They found that the main sources of pollution were from specific rivers, and that pollution levels varied throughout the year. Overall, the pollution levels were higher during high-water periods and in certain rivers. The study helps understand how pollution affects the lake and can help manage water quality in the future.