Multilayer vegetation zone water quality in situ purification method for highly polluted tributary inlet

Abstract

The invention relates to a multilayer vegetation zone water quality in situ purification method for a highly polluted tributary inlet, which is characterized in that reinforcing steel bars with the diameter of 6 and steel wires are manufactured into gabion frames with the diameter of about 1m; one end of each gabion frame is sealed; the other end of each gabion frame is movable; rock blocks, gravels and soil are added to the gabion frames; emergent aquatic plant root systems such as reeds, acorus calamus and the like are planted in soil; and each movable end is sealed and is manufactured into a gabion body with the length which is determined according to the river width of the tributary inlet to be purified. A plurality of gabion bodies are combined by timber piles and fixed at the tributary inlet to be repaired; ripraps are used for side pressing; submerged plants such as tape grasses, waterweeds an the like are planted between two gabion bodies so as to form a multilayer vegetation zone water quality in situ purification system which takes the plurality of gabion bodies and emergent aquatic plants on the gabion bodies as the main parts and is assisted by the submerge plants among the gabions. The method has the advantages of gradually purifying water body of the highly polluted tributary inlet under of physical chemistry and biological functions including matrix interception, micro-biological degradation, plant system absorption, root system adsorption and the like and improving water environments of the tributary inlet so as to provide effective guarantee for the quality of water flowing into a main stream.

Description

[0001] Technical Field The present invention relates to an in-situ purification method for multi-layered plant strips of heavily polluted tributary estuaries, which is suitable for normal water level conditions of tributary rivers, and belongs to the technical field of water quality purification and ecological restoration of river water bodies. . Background technique [0002] In recent years, due to the acceleration of urbanization and the development of industry and agriculture, the pollution of rivers and lakes has intensified, and some water bodies have even lost their ecological functions, which has greatly hindered the progress of human society and the improvement of people's quality of life. At present, the characteristics of surface water quality nationwide are: the water quality of main streams is better than that of tributaries, reservoirs are better than lakes, lakes are better than river courses, and water quality in mountainous areas is better than that of plain riv...

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Problems solved by technology

[0003] Research by many experts and scholars has found that the current tributary water pollution in my country is mainly reflected in three aspects. First, the application of chemical fertilizers and pesticides makes the water quality of farmland ditch drainage poor, which in turn leads to serious water pollution at the tributary estuary of farmland drainage; second, rural domestic sewage And poultry feces lead to serious water pollution in tributary rivers in rural villages; third, the discharge of urban domestic sewage and some industrial point source pollution leads to poor water quality in urban tributary rivers entering the main stream

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