Dazu District carried out river dredging. While vigorously implementing the sewage outfall regulation,
river dredging and ecological restoration were also implemented. They dredged 4.7 kilometers in
severe sections of river bottom sludge it was used silt curtains and dredgers, it was also carried out
the sterilization and disinfection of bank slopes, and construction of submerged dams were
implemented. Then they planted 30,000 square meters of aquatic plants such as cannabis, parasol,
iris, and water lilies near the river,it can effectively absorb nitrogen and phosphorus to notify water
pollutants, which can not only purify water quality, improve ecology, but also play a role in optimizing
and beautifying the environment.