摘要：Rain gardens are not yet a very popular solution in Poland but their number in cities is steadily growing. They are a measure of adaptation of cities to climate change. Rain gardens can be effective in rainwater retention and delaying runoff or groundwater recharge via infiltration. Among the benefits, also rainwater purification function is often suggested. The aim of the study was (1) to analyze potential phosphorus leaching from construction materials sampled from two rain gardens, and (2) to assess the quality of effluent from multi-layered rain garden in container. Results showed that materials commonly used in filling up rain gardens (sand and gravel) can be a significant source of phosphorus in filtered rainwater. Concentration of phosphorus in both, roof runoff and effluent from multi-layerded rain garden, show different patterns in different series. These preliminary studies show the need of continuous monitoring of existing rain gardens, as well as responsible selection of filter materials for newly built ones.
