River and lake ecological restoration system

Abstract

The invention relates to a river and lake ecological restoration system. The system structurally comprises an ecological river channel, a functional wetland buffer area and a near-natural wetland area and is connected with a water outflow end of a river channel entering a lake or reservoir; the ecological river channel comprises a riverbed, an ecological floating island arranged on the riverbed, ecological patches continuously or discontinuously arranged in a water area close to the bank beside the riverbed, and a riparian zone plant bed continuously or discontinuously arranged on the bank of the riverbed. The functional wetland buffer area is sequentially set to be an ecological precipitation pond, a subsurface flow constructed wetland, an aquatic plant pond and an overflow weir from front to back in the water flow direction; and the near-natural wetland area is arranged in the front area of the lake or reservoir and is connected with the overflow weir of the functional wetland buffer area, and the liquid level of the near-natural wetland area is lower than the overflow height of the overflow weir. According to the river and lake ecological restoration system, ecological systems of rivers, lakes and reservoirs can be effectively repaired and improved, micro-polluted river water is obviously purified and improved, and the effluent quality can reach the IV type or above of the national surface water quality standard (lake and reservoir standard).

Description

technical field [0001] The invention relates to an upstream river input type lake water environment ecological restoration system, in particular to a river and lake ecological restoration system. Background technique [0002] Rivers and lakes are one of the main water bodies in the global water environment system. They play an irreplaceable role in water supply, fish farming, water transportation, microclimate regulation, species diversity protection, etc., and are closely related to human production and life. , and therefore are greatly affected by human activities. At present, the shortage of ecological supplementary water and the discharge of large-scale production and domestic wastewater have caused a certain degree of water pollution to the rivers flowing through the city. The excessive input of nutrients such as nitrogen and phosphorus exceeds the self-purification capacity of the river and the capacity of the water environment. The river water in similar rivers gradu...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an ecological restoration system for rivers and lakes to solve the problems of deteriorating water quality and serious ecosystem degradation in the upstream river input lake system

Images