Submerged plant restoration method for coastal city semi-salty water body polluted bottom mud

Abstract

The invention discloses a submerged plant restoration method for coastal city semi-salty water body polluted bottom mud. The method comprises the following steps: step 1, carrying out salinity detection on a water body, dividing the water body into a plurality of water area water bodies with different salinity ranges according to salinity, and setting the plurality of different salinity ranges ina continuous gradient manner, wherein the salinity of the divided water area water body is not greater than 2%; and step 2, correspondingly planting different submerged plants suitable for growth in the water bodies of the water areas with different salinity ranges. The method has the advantages that the ecological landscape of the semi-salty water body can be recovered, the ecological diversity of the semi-salty water body is improved, release of nitrogen and phosphorus in the polluted bottom mud to the water body is relieved, and water body eutrophication is controlled.

Description

technical field [0001] The invention relates to the technical field of urban water environment restoration, in particular to a submerged plant restoration method for polluted bottom mud of brackish water bodies in coastal cities. Background technique [0002] Alternating brackish and fresh water body is the intersection zone of river ecosystem and marine ecosystem, and is a complex ecological water environment area. There are many rivers and lakes in the southern coastal zone of my country, and the water ecological environment is intricate. Due to natural reasons such as typhoon weather, astronomical tides, and estuary circulation, seawater flows into seawater toward the land, resulting in a gradual increase in the salinity of the freshwater area, forming a water landscape in which the freshwater-saltwater gradient alternates. The salinity of brackish water ranges from 0% to 2%. Due to the influence of salinity, the water quality of rivers and lakes and the physical and che...

AI Technical Summary

Problems solved by technology

Compared with fresh water, the salinity in brackish water will reduce the osmotic potential of soil solution. Aquatic plants in this water body will suffer from cell osmotic damage and physiological poisoning, and their roots will die from anoxic poisoning, which will lead to changes in the structure and function of the aquatic ecosystem, resulting in brackish water. The stability of the water ecosystem is poor, the self-purification ability of the water body is weak, the coastal ecological landscape is depressed and fragile, and water environment problems such as eutrophication are prone to occur

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