According to the present specification, an urban rain garden system is disclosed. Provided is the flooding protection type greenery system, wherein the rain garden system comprises a plant unit having a Leercia spp. plant and a Cyperius spp. plant, a penetration unit, and a water storage unit to be designed and installed in an effective space near a building and street trees of an urban, for example, a rooftop and a park in order to reduce flooding and a non-point pollution source and supply water to a vegetation plant when there is no rain to maintain a green space for a long period of time.
展开▼
