The scientists tried to improve the water quality of Hangzhou's West Lake by adjusting how water is moved around the lake. By using computer models, they figured out the best way to divert and distribute water within the lake. They found that diverting 70,000 tons of water a day and using a "2 in 3 out" strategy helped a lot. After they made these changes, the levels of phosphorus, nitrogen, and Chlorophyll A in the lake got better by around 26.0%, 8.9%, and 25.9%, respectively. They also managed to reduce the dead water area from 35% to 13%, making the water quality much better in the areas where the changes were made.