Disclosed is a non-powered seawater pumping apparatus for reducing seawater intrusion in a land in which an aquifer with a seawater-fresh water boundary surface is formed. The seawater pumping apparatus includes a pumping pipe having two open end portions, a first end portion of the open end portions being positioned below a sea level and a second end portion being positioned below the seawater-fresh water boundary surface in the land, and a well disposed to surround a lateral surface of a land-buried portion of the pumping pipe, which is buried in the land, so as to space away the land-buried portion of the pumping pipe from the land. The pumping pipe is filled with seawater, and the well comprises a screen having a plurality of through holes formed along a circumference of the well at a lower end portion of the well.

Disclosed is a non-powered seawater pumping apparatus for reducing seawater intrusion in a land in which an aquifer with a seawater-fresh water boundary surface is formed. The seawater pumping apparatus includes a pumping pipe having two open end portions, a first end portion of the open end portions being positioned below a sea level and a second end portion being positioned below the seawater-fresh water boundary surface in the land, and a well disposed to surround a lateral surface of a land-buried portion of the pumping pipe, which is buried in the land, so as to space away the land-buried portion of the pumping pipe from the land. The pumping pipe is filled with seawater, and the well comprises a screen having a plurality of through holes formed along a circumference of the well at a lower end portion of the well.

Disclosed is a non-powered seawater pumping apparatus for reducing seawater intrusion in a land in which an aquifer with a seawater-fresh water boundary surface is formed. The seawater pumping apparatus includes a pumping pipe having two open end portions, a first end portion of the open end portions being positioned below a sea level and a second end portion being positioned below the seawater-fresh water boundary surface in the land, and a well disposed to surround a lateral surface of a land-buried portion of the pumping pipe, which is buried in the land, so as to space away the land-buried portion of the pumping pipe from the land. The pumping pipe is filled with seawater, and the well comprises a screen having a plurality of through holes formed along a circumference of the well at a lower end portion of the well.

Disclosed is a non-powered seawater pumping apparatus for reducing seawater intrusion in a land in which an aquifer with a seawater-fresh water boundary surface is formed. The seawater pumping apparatus includes a pumping pipe having two open end portions, a first end portion of the open end portions being positioned below a sea level and a second end portion being positioned below the seawater-fresh water boundary surface in the land, and a well disposed to surround a lateral surface of a land-buried portion of the pumping pipe, which is buried in the land, so as to space away the land-buried portion of the pumping pipe from the land. The pumping pipe is filled with seawater, and the well comprises a screen having a plurality of through holes formed along a circumference of the well at a lower end portion of the well.

A method of designing an optimized seawater pumping apparatus, using a computer in a system in which a seawater pumping apparatus including a pumping pipe and a well disposed to surround a lateral surface of a land-buried portion of the pumping pipe is installed to reduce seawater intrusion in a land in which an aquifer with a seawater-fresh water boundary surface is formed, includes applying an optimization algorithm to initial condition data of the aquifer to generate n decision variable sets of the seawater pumping apparatus, applying an underground water flow model to each of the n decision variable sets to generate n prediction results of change in the seawater-fresh water boundary surface, calculating a performance evaluation value of each of the n prediction results, and selecting a decision variable set having a maximum performance evaluation value, where n is an integer and equal to or greater than 2.

A method of designing an optimized seawater pumping apparatus, using a computer in a system in which a seawater pumping apparatus including a pumping pipe and a well disposed to surround a lateral surface of a land-buried portion of the pumping pipe is installed to reduce seawater intrusion in a land in which an aquifer with a seawater-fresh water boundary surface is formed, includes applying an optimization algorithm to initial condition data of the aquifer to generate n decision variable sets of the seawater pumping apparatus, applying an underground water flow model to each of the n decision variable sets to generate n prediction results of change in the seawater-fresh water boundary surface, calculating a performance evaluation value of each of the n prediction results, and selecting a decision variable set having a maximum performance evaluation value, where n is an integer and equal to or greater than 2.

Disclosed is a non-powered seawater pumping apparatus for reducing seawater intrusion in a land in which an aquifer with a seawater-fresh water boundary surface is formed, the apparatus including a pumping pipe having opposite open end portions, a first end portion of the opposite open end portions being positioned below a sea level and a second end portion being positioned below a seawater-fresh water boundary surface in the land, and a well disposed to surround a lateral surface of a land-buried portion of the pumping pipe, which is buried in the land, so as to space away the land-buried portion of the pipe from the land, wherein seawater is filled in the pumping pipe, and the well includes a screen having a plurality of through holes formed along a circumference of the well at a lower end portion of the well.

Disclosed is a non-powered seawater pumping apparatus for reducing seawater intrusion in a land in which an aquifer with a seawater-fresh water boundary surface is formed, the apparatus including a pumping pipe having opposite open end portions, a first end portion of the opposite open end portions being positioned below a sea level and a second end portion being positioned below a seawater-fresh water boundary surface in the land, and a well disposed to surround a lateral surface of a land-buried portion of the pumping pipe, which is buried in the land, so as to space away the land-buried portion of the pipe from the land, wherein seawater is filled in the pumping pipe, and the well includes a screen having a plurality of through holes formed along a circumference of the well at a lower end portion of the well.

Disclosed is a non-powered seawater pumping apparatus for reducing seawater intrusion in a land in which an aquifer with a seawater-fresh water boundary surface is formed, the apparatus including a pumping pipe having opposite open end portions, a first end portion of the opposite open end portions being positioned below a sea level and a second end portion being positioned below a seawater-fresh water boundary surface in the land, and a well disposed to surround a lateral surface of a land-buried portion of the pumping pipe, which is buried in the land, so as to space away the land-buried portion of the pipe from the land, wherein seawater is filled in the pumping pipe, and the well includes a screen having a plurality of through holes formed along a circumference of the well at a lower end portion of the well.

Disclosed is a non-powered seawater pumping apparatus for reducing seawater intrusion in a land in which an aquifer with a seawater-fresh water boundary surface is formed, the apparatus including a pumping pipe having opposite open end portions, a first end portion of the opposite open end portions being positioned below a sea level and a second end portion being positioned below a seawater-fresh water boundary surface in the land, and a well disposed to surround a lateral surface of a land-buried portion of the pumping pipe, which is buried in the land, so as to space away the land-buried portion of the pipe from the land, wherein seawater is filled in the pumping pipe, and the well includes a screen having a plurality of through holes formed along a circumference of the well at a lower end portion of the well.