PURPOSE: An integrated nonpoint pollution source treatment facility using a gardening structure of a parking lot is provided to process the nonpoint pollution and landscape the parking lot at the same time. CONSTITUTION: An integrated nonpoint pollution source treatment facility comprises the following: an integrated nonpoint pollution source treatment unit including a top pretreatment tank(210), an intermediate filtration tank(220), and a bottom water collecting and discharging tank(230)； a pretreatment tank body(211) formed in a box shape with openings on the top and the bottom； an external inlet(212) formed on front and rear walls of the pretreatment tank body for inflowing rainfall effluent from the parking lot； an internal inlet(213) formed on left and right walls of the pretreatment tank body for receiving inflow water in a garden composition unit； and a pretreatment filtration net(217) installed inside the pretreatment tank body for pre-treating the rainfall effluent.본 발명은 주차장 화단조경시설을 이용한 통합비점오염원 처리시설에 관한 것으로, 식생토가 충전되고 초목류가 식재된 화단조성부와 강우유출수를 처리할 수 있는 통합비점오염 처리부를 결합하여 주차장 지역에 화단을 조성할 수 있음과 아울러 적절한 비점오염 처리를 수행할 수 있게 되며, 통합비점오염 처리부가 상단 전처리조와 중단 여과조 및 하단 집수배출조를 포함하하여 강우유출수의 유입량에 따라 적합한 비점오염 처리를 수행할 수 있도록 한 것이다.
