According to an official from Qingpu's Bureau of Water Resources, in the principle of "preserving and improving the primitive ecology", the District worked out three guidelines. First, dredging the water area: eliminating garbage, sunken boats, fishing nets and illegal structures by the riverside, while keeping the natural bottomland and marsh if they do not block the flow of water too much. Secondly, consolidating slopes along the riverside. Making the best of the natural plants and keeping the U-shape slopes in places where soil quality is good and vegetation is rich. Meanwhile, growing plants and lowering slopes in places where soil quality isn't good and vegetation is little. Thirdly, preserving riversides with rich vegetation and solid bank, growing more plants on those with sparse vegetation and loose bank, and growing plants and doing maintenance on riversides without vegetation. By the end of June, 236 riverways or 234 kilometers riversides have been dredged. Following the achievements in improving the riverways, the Finance Bureau of the Qingpu District plans to invest RMB5 million annually in rewarding maintenance of clean riverways in villages instead of the past practice of just granting subsidy. The investment will support villages to keep riverways clean. In a word, it is hoped that rivers are kept from pollution once they are cleaned up.

Now, the 800-mu Dadian Lake in Zhujiajiao Town has been dredged, thanks to the past year's dredging project. Riversides are expanded, revetment is built and landscape greening is implemented. The ecosystem of the lake has been greatly improved. The ever-extinct fish and shrimps again appear in the Dadian Lake, making it like a "Little West Lake" with green mist-covered water and leisurely flying egrets.

Besides, in view of the water quality of the Dianshan Lake and its status quo of aquatic resources, the Qingpu District implemented two-round environmental protection schemes to improve the water quality of the Lake. Since farmlands, rivers and lakes are interlinked, according to relevant authorities of the Qingpu District Agricultural Committee, control of the pollution sources is the key to the problem. Agricultural source pollution regulation mainly relies on reduction of chemical fertilizer and pesticide by plant industry, popularization and use of high effective and low poisonous new pesticide, generalization of organic and inorganic substitution techniques (organic nutrient replace some inorganic nutrient) as well as decrease of use of nitrogenous fertilizer. The Shanghai Finance Bureau subsidized RMB9,425,000 and the Qingpu District Finance Bureau subsidized RMB3.77 million over the past 4 years. Meanwhile, pesticide spraying machines are renovated to avoid pesticide spilling by old machines. The Qingpu District promoted more than 1,400 small spraying machines in 2004, 3,730 small and 150 large spraying machines in 2005, and 676 new spraying machines in 2006, among which there were 276 large single-frame spraying machines and 400 atomizing machines. The Qingpu District Finance Bureau subsidized RMB1,887,400 on machinery renovation.