Wet pond system for sponge city and rainwater purification method thereof

Abstract

The invention provides a wet pond system for a sponge city and a rainwater purification method thereof. The wet pond system comprises a water distribution system, a front purification system, a main pond system and a drainage system, wherein water flow can sequentially pass through the water distribution system, the front purification system, the main pond system and the drainage system; the water distribution system comprises a water inlet and a drop aeration slow flow structure located below the water inlet, the drop aeration slow flow structure comprises a drop step, and the upper portion of the tail end of the drop step is sequentially provided with a baffle pier and a slow flow sill; and the main pond system comprises a main pond, a water distribution gabion and a first emergent aquatic plant bed, the water distribution gabion is arranged in a soil cofferdam, and the first emergent aquatic plant bed is arranged on the soil cofferdam close to one side of the main pond and located below the water distribution gabion. The wet pond system is easy and fast to construct, time and labor are saved during maintenance, rainwater is effectively purified, rainstorm flood peak time can be delayed, upstream rainwater is regulated and stored, meanwhile, beautiful landscape is created, residents are attracted to play, and the wet pond system can be used for municipal roads, parks and residential areas.

Description

Technical field[0001]The present invention relates to the field of sponge urban construction, and in particular to a wet pond system for sponge cities and a method of purifying rainwater.Background technique[0002]In the 21st century, as the economy continued to develop rapidly, my country's urbanization has also made great progress. However, the urban natural surface is replaced by the impervious rigid material of the living area, which has changed the landform structure of the surface. It has caused bad influence on the natural ecological environment. The urban flood disasters, the deterioration of ecological environment is increasingly high. Based on this, the construction of sponge city is an important measure to solve the current drought and flood and flood and flood in the city, the dilemma of facial source pollution, the deterioration of ecological environment, and the construction of eco-rain management system. Wettam is one of the important technical means of sponge city, lo...

AI Technical Summary

Problems solved by technology

Wet ponds are generally composed of water inlets, pre-ponds, outlet ponds, overflow outlets, etc., but the oxygen content of inflow rainwater is low, which leads to a great reduction in the treatment effect of follow-up facilities; the water flow rate is too high, which severely scours the wet pond slope, resulting in Water and soil loss; the purification function of the front pond is single, and often only rely on aquatic plants to purify and absorb pollutants; the wet pond does not replenish water sources in dry seasons, especially the aquatic plants in the front pond without the water supply from the outlet pond, often dry up and die

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