Water wash sampling method for deposited pollutants on urban impermeable ground surface

The invention provides a water wash sampling method for deposited pollutants on the urban impermeable ground surface and belongs to the cross field of the municipal engineering technology and the environment engineering technology. The accumulation amount of the deposited pollutants on the urban impermeable ground surface before raining represents the pollution level of the urban impermeable ground surface before raining, and no sampling method exists. A frame sampler is pressed and fixed on a selected urban impermeable ground surface, the gap between the frame sampler and the urban impermeable ground surface is sealed with plasticine, the frame sampler is filled with water, a brush which is wetted in advance is used for cleaning the pollutants in the frame sampler, and particularly corners of the frame sampler are cleaned thoroughly; a direct current vacuum pump is started, and a mixed solution in the frame sampler is absorbed into a wild-mouth bottle. According to the water wash sampling method for the deposited pollutants on the urban impermeable ground surface, the accumulated pollutants on the urban impermeable ground surface before raining can be accurately collected; the filling-digging amount of the urban impermeable ground surface can be indirectly measured; manufacturing is easy, the operation is simple, and the implementing criterion of the method is guaranteed.