PURPOSE: An apparatus for controlling the water level of a wetland is provided to optimize the water level of a wetland by automatically controlling the amount of drained water. CONSTITUTION: An apparatus for controlling the water level of a wetland comprises a water source inflow unit(100) and an outflow control unit(200). The water source inflow unit is installed on a wetland(10) and is connected to an inlet channel(15) formed under an inflow agricultural waterway(20) to send water to the wetland in a direction. The outflow control unit is installed on one side of the wetland and drains naturally purified water flowing through the water source inflow unit to an outflow agricultural waterway(21).
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