Method for rapidly restoring foreshore wetland outside levee

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...

AI Technical Summary

Problems solved by technology

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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