2. Dredge the near-water environment. The water source of Taihu Lake is located in the Tiaoxi River system in Tianmu Mountain, Zhejiang Province, with a drainage area of 640,000 square kilometers, and 70% of the water is injected into Taihu Lake. In addition, Nanxi water system, which originated in Yili mountain area, covers an area of 8,000 square kilometers, and 80% of the water flows into Taihu Lake, with short source distance, limited pollution along the way, pure water quality and abundant water. Therefore, as long as the estuaries and rivers of the above two water systems are well dredged and protected, enough water can be saved, the source water of Taihu Lake can be replenished smoothly, the water circulation of Taihu Lake can be promoted, the discharge of sewage can be stopped, the dredging and dredging of the source water system can be done well, and clean source water can enter Taihu Lake. In addition, the surrounding tributaries, streams and ponds are dredged, unnecessary dams are removed, and sluices are controlled to form a natural water environment in which Taihu Lake actively enters and flows out appropriately.
This is an important measure to cut off pollution sources. Any factory that discharges pollutants into the water system around Taihu Lake must meet the pollution control standards before it can be produced. It is necessary to prohibit undercurrent sewage from entering Taihu Lake and canal water system. Special attention should be paid to the communication between ponds and rivers along lakes and canals. Housing developers are prohibited from using rivers as sewage discharge channels. To restore the river course that has been developed into a landfill, if necessary, demolish the houses and let them return to the river course, so that the remaining sewage can be naturally purified through the dense river ditch network unique to the south of the Yangtze River to avoid directly flowing into Taihu Lake.
4. Integrated management. Controlling the sewage in Taihu Lake is as important as the pollution in the Beijing-Hangzhou Canal. The inflow and outflow of Taihu Lake connect the water system of the Beijing-Hangzhou Canal. The pollution of canal water system will definitely make Taihu Lake water system suffer. The pollution of canal water system is mainly concentrated in management. Governance and management should be comprehensively considered and arranged as a whole. It is necessary to carry out long-term supervision and set up special institutions to monitor the pollution of lakes and rivers. At the same time, local laws and regulations should be formulated to make tourism, shipping, planting, breeding and construction under effective supervision. Let the whole society care about Taihu Lake and the environment, and let Taihu Lake feed and nourish its children forever.