Technologies and testing procedures

Progressive soil sealing combined with an increasing occurrence of heavy rainfall events represents an enormous challenge for urban drainage. In addition, a significant proportion of the pollution of watercourses is due to the discharge of polluted rainwater, especially from traffic surfaces. This is in opposition to the objectives of the EU Water Framework Directive (WFD), which calls for improving the water quality. If one additionally considers the requirement of the German Water Resources Act for the local infiltration or discharge of rainwater, then alternatives to central treatment...