Method for quickly creating or repairing mangrove forest by constructing levee foot submerged dam

Abstract

The invention discloses a method for quickly creating or repairing a mangrove forest by constructing a levee foot submerged dam. The method comprises the following steps that an underwater submerged dam is constructed on the outer side of a seawall, mudflat treatment is performed to form a suitable forest land, and a mangrove forest is transplanted and repaired. The method is used for a standard seawall or an ecological seawall, and the problems that in the seawall construction process, mangrove forests cannot be planted and plant transition zones cannot be formed due to the fact of rapid water flow of deep ditches in the outer side of the seawall and the mudflat, steep slope, serious erosion, insufficient elevation and the like are solved. Practical application shows that the suitable forest land area with the proper elevation and the slow water flow can be formed on the mudflat on the outer side of the seawall, sea waves can be weakened, soil loss can be prevented, the mangrove forest can be quickly created or repaired, and therefore continuity and ecologicalization of the ecological seawall are achieved.

Description

technical field [0001] The invention belongs to the technical field of ecological transformation of standard seawalls or construction of ecological seawalls, and in particular relates to a method for quickly creating or restoring mangroves by building submerged dams at the foot of embankments. Background technique [0002] In 2017, the State Oceanic Administration issued the "Coastline Protection and Utilization Management Measures", which stipulates that by 2020, the national natural coastline retention rate will not be lower than 35%. In areas where the natural coast is insufficient, the ecological transformation of the traditional artificial coast (standard seawall) is an important means to achieve this goal. In 2012, Guangxi Mangrove Center first proposed the concept of ecological seawall and applied it to the construction of seawall in Fangchenggang City, Guangxi. Ecological seawalls should meet the requirements of naturalization, greening and ecologicalization. Howeve...

AI Technical Summary

Problems solved by technology

Ecological seawalls should meet the requirements of naturalization, greening and ecologicalization. However, in the process of seawall construction, soil is often taken from the beach at the foot of the embankment, resulting in a seawall with a width of 20m to 50m towards the sea and a depth of 0.5- The 1m deep ditch destroys the original mangrove forest and hinders the continuity and communication between the seawall and the sea

Moreover, these deep ditches are often of low elevation and rapid flow, making it extremely difficult to restore the mangroves naturally.

At the same time, many tidal flats outside the seawall have steep slopes, turbulent water flow, and insufficient elevation, so natural mangroves cannot grow.

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