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Permeable pavements of concrete paving-stones for rainwater infiltration are established as a sustainable method for the drainage of traffic areas and for pollutant source control. Various systems for different applications exist. Pollutants like heavy metals and hydrocarbons in the runoff can endanger soil and groundwater, when the they are not sufficiently removed during infiltration. Clogging and the decrease of infiltration capacity are problems that must be considered if permeable pavements are demanded to be used as an alternative to traditional drainage systems. In this study the pollution retention capacity of different permeable road constructions is assessed in the laboratory and in field investigations. A new cleaning device to recover the infiltration capacity was developed, that ensures a lifetime operation of the investigated pavements. With special designed concrete pavers a sufficient protection of soil and groundwater can be achieved. The use of permeable pavements is sustainable, if planning, construction supervision and maintenance are carried out according to the latest research results.
Dierkes et al. (Thu,) studied this question.