Rain garden using a wetland with centripetal flow

摘要

The present invention includes a settling tank 110 in which sediment contained in rainwater introduced from the outside is precipitated, a filter 120 fixed to an upper portion of the settling tank 110 and having a filling space 121 therein, and the filling space ( 121) a rainwater treatment unit 100 including a plurality of floating filter media 300 filled at a predetermined ratio of the volume; and a centripetal wetland 200 for filtering pollutants contained in the rainwater while the rainwater transferred from the rainwater treatment unit 100 flows in the centripetal direction; When filled, the air gaps of the floating filter media 300 are reduced while the floating filter media 300 are floated and compressed to the upper portion of the filling space 121 by the rainwater filled in the filling space 121, and the It relates to a rainwater garden using a centripetal wetland in which foreign substances contained in rainwater are filtered through the reduced pores of the floating filter media (300).