Fresh water ecosystem restoration method based on seed bank activation and biological regulation and control

Abstract

The invention discloses a fresh water ecosystem restoration method based on seed bank activation and biological regulation and control, which comprises the steps of (1) checking point sources and scattered pollution discharge entering a water body, distinguishing pollution sources and intercepting pollution; (2) sampling and analyzing the bottom mud, sampling, investigating and analyzing a seed bank, determining a seed bank structure in a laboratory, analyzing dominant plants before recession, analyzing an aquatic plant community structure, determining pioneer species of submerged plants, anddetermining pioneer species seed bank activation conditions in the laboratory; (3) carrying out on-site detection and analysis on water body conditions; (4) activating the seed bank, specifically, (1)controlling the total nitrogen concentration of the restoration area, (2) controlling the total phosphorus concentration of the restoration area and inhibiting the growth of microalgae, and (3) controlling the water depth / transparency of the restoration area; and (5) conducting biological regulation and control, specifically, (1) adding benthonic animal snails and herbivorous fishes, and (2) adding filter-feeding fishes. The sediment seed bank is used for activating and restoring the water ecological environment, underwater vegetation degradation caused by external pollution is treated, the cost is low, and the effect taking speed is high.

Description

technical field [0001] The invention relates to a restoration method applied to urban polluted water bodies or polluted water areas of rivers and lakes to construct local water ecosystems, and belongs to the technical field of sewage treatment restoration. Background technique [0002] As the water ecosystem is under increasing pressure, problems such as water source depletion, water pollution, and eutrophication have emerged. Phenomena such as river cut-off, wetland shrinkage and demise, groundwater overexploitation, and oasis degradation have also occurred in many places. Ecological protection and restoration work is becoming more and more important. The ecological restoration countermeasures adopted are mainly based on the investigation and analysis of the hydrology, water quality, and bottom quality of eutrophic lakes. By controlling sources and using habitat restoration measures to create ecological restoration conditions, artificially rebuild aquatic vegetation and lak...

AI Technical Summary

Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a freshwater river and lake seed bank activation method to control the degradation of aquatic plant ecological communities, and restore the water ecosystem as a whole through biological regulation technology. This method makes full use of the water sediment seeds before the decline The condition of the seed bank can be activated through the activation method, which can not only greatly improve the efficiency of ecological restoration, but also solve the problems of high cost and long effective time of ecological restoration of the existing water ecosystem