This project belongs to the application technical achievement of the management and restoration of eutrophication of urban green space landscape water bodies. Eutrophication of surface water in my country has become more common and is increasing day by day. 93% of park water bodies in my country have been polluted to varying degrees, and the phenomena of black, smelly and eutrophication of water bodies are relatively serious. Green landscape water bodies are an important part of urban aquatic ecosystems. However, due to the impact of human activities and the lack of unified supervision, the quality of the water environment continues to deteriorate, leading to a decline in the quality of the living environment, which in turn affects the construction of the entire eco-city. Therefore, it is urgent to carry out ecological restoration of eutrophic landscape waters. The main results of this research are as follows:
(1) It was the first to conduct a comprehensive and systematic investigation and analysis of Shanghai's green landscape water bodies. The results showed that most of Shanghai's landscape water bodies were static small water bodies and were in an eutrophic state; about 64% of the total surveyed had design flaws, and the failure to build a complete aquatic ecosystem is currently the most common phenomenon in Shanghai's green landscape water bodies; different non-point source pollution and lack of water conservation and management are also important factors affecting water bodies.
(2) For the first time, a classification and classification study was conducted on Shanghai's green land landscape water bodies, and the landscape water bodies were divided into 4 levels. For the first time, a comprehensive evaluation was carried out on the eutrophication of green land landscape water bodies in Shanghai City. The eutrophication of green land landscape water bodies was divided into 8 levels. Through comprehensive evaluation, we can understand the conditions of different levels of water bodies, understand their eutrophication process and predict their development trends. We can not only formulate targeted water maintenance, restoration and management measures, It can also be used as a dynamic detection standard.
(3) We took the lead in screening shredded coconut, the ecological and environmentally friendly floating island substrate material, which greatly reduced the input cost, and screened more than 30 kinds of plant materials suitable for the floating island. Among them, six species such as calamus, cattail, iris, mosaic arcane, lythrum and wild wild rice bamboo have good effects in controlling nutrients. We took the lead in applying economic plant materials (vegetables, feed) to the floating island, expanding new methods of water body management, and realizing new ideas for water control and water protection produced by water bodies. Build a new model for conservation-saving water body management;
(4) Developed a stepped composite vertical flow constructed wetland sewage treatment device for the first time, and took the lead in developing 5 species of plant communities to control ammonia nitrogen pollution and nitrate nitrogen pollution water, and 3 species of plant communities to control phosphorus pollution water; Secondly, developed a composite vertical flow The artificial wetland simulation system provides data and technical support for the configuration of artificial wetland communities; Finally, combined with the research results of artificial wetlands, the Jinhai Wetland Management Project was designed and implemented;
(5) We took the lead in developing and integrating nano-air flotation-flocculation rapid algae removal technology, and developed a nano-air flotation-flocculation algae treatment tank, which can quickly remove algae in small landscape water bodies. This technology covers a small area, has fast algae removal technology, and has obvious treatment effects and is suitable for promotion and application in urban Shanghai, and does not affect the environmental landscape and residents 'lives; at the same time, we integrated 4 water body restoration and treatment technologies combined with different landscape water bodies, and established 5 demonstration sites.
(6) Published 15 articles such as "Purification Effect of Aquatic Plants on Polluted Water Bodies","Near-Natural" Urban Rivers, Water Body Ecological Restoration and Waterscape Greening Construction "," Purification Effect of Aquatic Plants on Nitrogen and Phosphorus in Polluted Water Bodies ", and" Liwa River Near-Natural Restoration Project and Effect Analysis of Damaged and Degraded Ecosystems "and" Research on the Purification Effect of Aeration on Nitrogen in Landscape Water Bodies of Composite Vertical Flow Constructed Wetland "; Cultivated 14 master's degree students.