The river course is a broken river, with residential areas on both sides, and the riverbank is an upright block stone retaining wall. Endogenous pollution caused by river sediment deposition; Incomplete shoreline, non-point source pollution caused by initial rainwater scouring the road surface; At the same time, the river ecosystem is seriously lacking, and the river self-purification ability is lacking. Before treatment, the river water quality is inferior to Class V.
In view of this situation, in addition to adopting aeration and reoxygenation system, various submerged plants, such as Ceratophyllum demersum, Illicium verum, etc., which have been modularly cultivated, are put in to cultivate water microorganisms and construct a modular underwater forest ecosystem. At the same time, with the help of emergent plants and floating-leaf plants, the missing biological population and structure in the aquatic ecosystem can be restored, and the purpose of rebuilding the good structure of the aquatic ecosystem, repairing and strengthening the functions of the aquatic ecosystem can be achieved. After treatment, the river water quality reaches Class III water standard stably.
