Method for developing land

Abstract

Provided is a method for developing land through the workings of nature. An island (1) is covered with a sealing dome (3) larger than an aboveground part (1a) of the island such that a space (s1) is created between the island (1) and the sealing dome (3) and a lower edge (3a) of the sealing dome (3) is located in the sea, i.e., below the sea level (2). Subsequently, with a gap (s2) between the lower edge (3a) of the sealing dome (3) and a sea bottom (1b), a pile (4) secured to the lower edge (3a) of the sealing dome (3) with a bolt (not shown) is driven into the sea bottom (1b) to secure the sealing dome (3). Then, a pump (5) provided in the sealing dome (3) is actuated to reduce the air pressure of the sealing dome (3). According to the Pascal's law, this causes the seawater to be drawn into the sealing dome (3), allowing the sea level (2a) inside the sealing dome (3) to rise above the aboveground part (1a) of the island (1). With the island (1) left under this condition, coral (6) will naturally grow thereon.

Description

TECHNICAL FIELD[0001]The present invention relates to a method for developing land such as an island.BACKGROUND ART[0002]In small islands such as Okinotori Islands, for example, coastlines are disappearing due to coastal erosion and rising sea level caused by global warming, and these islands are at risk of going underwater. To deal with this, measures for solving the problem of coastal erosion have been taken, which include placing a plurality of concrete blocks on the sea bottom near the coast so as to absorb the force of approaching waves.[0003]In Patent Document 1, for example, a method of building a natural rock block that is formed by mounting natural rocks on the surface of a concrete block is disclosed. By placing these natural rock blocks on the ground, the current velocity and wave force can be stabilized while maintaining the natural ecosystem, without sacrificing the natural landscape.[0004]As a solution to the problem of disappearing coastline, a method of placing concr...

AI Technical Summary

Benefits of technology

The present invention allows for the raising of the water level in a sealing dome, which results in the natural growth of coral on an island. This promotes land development through the workings of nature. Additionally, the invention provides a sealing dome that can withstand an arc-shaped cross section and sufficient air pressure to maintain strength. Additionally, increasing air pressure in the sealing dome lowers the water level, exposing underwater rock and increasing the area of land.

Problems solved by technology

In small islands such as Okinotori Islands, for example, coastlines are disappearing due to coastal erosion and rising sea level caused by global warming, and these islands are at risk of going underwater.

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