Ecological method for repairing concrete grating revetment of river level fluctuation zone by using plants

A technology of river water level and phytoremediation, which is applied in the direction of botanical equipment and methods, applications, coastline protection, etc., and can solve problems such as poor substrate conditions, poor germination ability of cuttings, and low survival rate

Inactive Publication Date: 2012-03-21
EAST CHINA NORMAL UNIV
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Problems solved by technology

However, if the cuttings are directly inserted into the concrete grid, the germination ability of the cuttings is poor, especially in the concrete grid in the river water level fluctuation area with a certain saline-alkaline, due to the erosion of the soil in the grid, coupled with poor substrate conditions and root system Damaged by water erosion, the germinated seedlings grow slowly and have a low survival rate, and cannot play a good ecological landscape function

Method used

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  • Ecological method for repairing concrete grating revetment of river level fluctuation zone by using plants
  • Ecological method for repairing concrete grating revetment of river level fluctuation zone by using plants
  • Ecological method for repairing concrete grating revetment of river level fluctuation zone by using plants

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Embodiment 1

[0016] A. Selection of Plant Provenance

[0017] Willow selected in this embodiment 1 ( Salix matsudana Koidz) is an easy living plant from cuttings. Choose willow ( Salix matsudana Koidz), try to choose the local willow source in the area to be restored. If there is no local willow source, you can choose the willow source in the area with similar habitat (climate, soil conditions) to improve the adaptability of the seedlings to the environment.

[0018] B. Seedlings (seedlings engineered multiplication)

[0019] (1) Preparation of cuttings: before germination, select 2-year-old sprouts from adult willow plants in the field that are strong, free from diseases, insect pests, and branches, wrap the cuts with plastic film, and transport them back to a damp place indoors for storage. The cuttings were completed on the same day. The cuttings are trimmed to branches about 10cm long, and 3-4 buds are reserved. The bottom of the cuttings is flat (to prevent rot), and the u...

Embodiment 2

[0033]In artificial lakes and diversion channels formed by sea reclamation, the concrete grid method is the main revetment method in the water level fluctuation area of ​​the channel. Such as the construction of Shanghai Lingang New City. The urban construction land of Shanghai Lingang New Town is mainly the new land formed by reclamation along the tidal flats. An artificial drip lake with an area equivalent to the West Lake in Hangzhou has been constructed by reclamation. The radial diversion channels around it are artificially excavated rivers. Barriers are the main revetment form in river water level fluctuation areas. Due to the reclamation of the sea, the soil and surface water quality has a certain degree of saline-alkaline (the average soil salinity is about 4‰, and the pH value is 2.5‰, and the average pH value of the river is 3.15‰, and the average pH is 8.82). Apart from herbaceous plants, few woody plants grow. Both biodiversity and landscapes need to be enhanced ...

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Abstract

The invention discloses an ecological method for repairing the concrete grating revetment of a river level fluctuation zone by using plants, which is characterized in that Salix matsudana Koidz which can resist flooding and acid as well as alkali is selected, the provenance (namely sprout branches) is selected in the local area or similar ecological habitat, and after indoor seedling raising by cutting, seedling transplantation and outdoor seedling acclimatization, the branches are planted in the concrete grating in the river level fluctuation zone in a bag cultivation way for adaptive growth. The ecological method ensures the survival rate of planted seedlings and the nutrition requirement for growth of the seedlings in the early stage, and plays an important role in improving the ecological quality of artificial hard revetments and landscapes at the river bank zone, thus having a good application prospect.

Description

technical field [0001] The invention relates to the technical field of ecological environment protection and management, in particular to a willow tree ( Salix matsudana Koidz) to restore the ecology of the concrete grid revetment in the river water level fluctuation area. Background technique [0002] In order to prevent water and soil erosion in the river bank zone, hardening, semi-hardening works or only plant materials are usually used for revetment. The hard revetment destroys the substrate for plant growth and hinders the normal communication between the river and the terrestrial hydrology of the coastal zone, so its ecological function is weak. Except for special cases, this method of using hard revetment has been gradually eliminated. The method of only using plant materials for revetment has the strongest ecological function, but it is difficult to ensure the safety requirements of the river bank for some river sections with fast flow velocity, strong hydrodynamic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B3/12A01G17/00A01G15/00
Inventor 蔡永立
Owner EAST CHINA NORMAL UNIV
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