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A method for rapid recovery of side beach wetlands other than embankments
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A rapid restoration and embankment technology, applied in botany equipment and methods, horticulture, agriculture, etc., can solve the problems of low plant seed propagation, insufficient seed production, low seed availability, etc., to improve sparse vegetation, reduce The effect of water erosion and reducing wind and waves
Active Publication Date: 2020-08-25
EAST CHINA NORMAL UNIV
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Provenance limitation is mainly due to the following two conditions: the plant population is small and the availability of seeds is low, which reduces the number of effective dispersal; the production of plant seeds shows obvious spatio-temporal changes, resulting in a significant increase in effective seed dispersal. Spatio-temporal characteristics, resulting in small patches and low effective plant seed dispersal in small years
The original native vegetation on the beach is generally scattered, the seed production in small patches is insufficient, and the effective propagation is low. Therefore, it is difficult to expand if only relying on the original native vegetation on the beach
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[0037] refer to figure 2 , image 3 , to reconstruct the basement in the restoration area, that is, to excavate the third part of the permeable dam to a depth of 1 m. The original average elevation of this area is 0.5 m, and the basement elevation after excavation is -0.5 m. Stones are piled in this part to form a gentle slope type permeable dam, the highest The elevation is 1.5 m, the lowest elevation is 0.5 m, and the slope is 8 %; pine piles are densely distributed around the permeable dam, the depth is 2 m, and the height above the base is 0.5 m, which plays a role of stability and reinforcement. The width of the permeable dam is 3-4 m; The excavated soil is filled into the rapid recovery area 2, and the area is raised to an elevation of 1.5 m, so that the base elevation is not lower than the average high tide level of 0.2 m, and does not exceed the average high tide level. Grass planting bags are laid, reeds are planted, and the grass planting belt area The width is 5 m...
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Abstract
The invention discloses a method for rapidly restoring a foreshore wetland outside a levee. The method includes the steps: restoring a foreshore area with serious wind wave erosion and great difficulty in vegetation restoration outside the levee; lifting a base close to a levee area to form a rapid restoration area suitable for wetland plant growth, laying grass planting bags and planting reed wetland plants to rapidly form wetland vegetations; constructing a permeable dam at the outer edge of a grassed area, impacting the permeable dam by gentle water flow and densely covering the outer edge with pine piles to stabilize the permeable dam; densely covering an outer base of the permeable dam with pine piles in a circular form, lifting the base in a circle to form a plurality of plant island hills serving as an ecological conservation area, planting meadow rushes and local cattail wetland plants in the island hills and densely covering the outer sides of the plant island hills with wave dissipation piles. After the wetland vegetations in the ecological conservation area are mature, the ecological conservation area can serve as a provenance, and natural extension of surrounding wetlands is promoted. By technological means of multilayer wave dissipation and earthwork balance, the foreshore wetland with serious wind wave erosion outside the levee is rapidly restored, and stability of a wetland ecological system and functions is improved.
Description
technical field [0001] The invention belongs to the field of environmental ecological engineering, and in particular relates to a method for rapidly restoring edge beach wetlands other than dykes. Background technique [0002] According to the Ramsar Convention on Ramsar, wetlands include natural, artificial, permanent, staged, flowing, static, fresh or salt waters, rivers, lakes, reservoirs, swamps, wetlands , peatlands, rainforest wetlands, mountain grasslands, polar tundra, etc., as well as marine waters where the water depth at low tide does not exceed 6 meters, such as estuary deltas, ocean coasts, mangroves, coral reefs, etc. Wetland is a special natural complex in the transition zone between land and water, and has both characteristics. As one of the three major ecosystems of the earth, the wetland system is known as the "kidney of the earth". It is of great significance for improving ecological environment pollution, maintaining the biodiversity of the earth, and m...
Claims
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