WETLAND FUNCTION RESTORATION SYSTEM AND METHOD UNDER CONSTRAINT OF FLOOD DIVERSION AND RETARDING IN ESTUARY AREA

The present invention relates to a wetland function restoration system under the constraint of flood diversion and retarding in an estuary area. The system comprises a water intake unit, a water output unit, a reinforced purification area, and a natural purification area. The water intake unit comprises a water intake gate, an incoming water sedimentation pond, a water distribution main channel, and a water intake main channel, wherein the water intake gate is used for leading in water of a river section, the incoming water sedimentation pond is used for sedimenting silt of the incoming water, the sedimented water is then distributed through the water distribution main channel, and the water intake main channel guides the water in the water distribution main channel to enter the reinforced purification area; a multi-paddy field running water chain wetland in the reinforced purification area receives the water from the water intake main canal, and leads purified water into the natural purification area; there