Dezentrale Versickerung von Straßenabwässern im urbanen/innerstädtischen Raum

Abstract

In order to counteract the effects of climate change in the urban environment, namely intensive rainfall and development of heat islands, new concepts are needed. The main pur- pose of conventional urban drainage systems such as stormwater- or com- bined sewer systems is to quickly dis- charge the stormwater runoff into a re- ceiving water, but due to the increasing amount of connected areas and runoff volume these static systems become more and more prone to flooding. To relief the pressure on the sewer system and more importantly reactivate the local water cycle to provide a better urban climate, green infrastructure (GI) such as green roofs, green facades as well as bioretention filters have proven to be appropriate measures on the lo- cal scale. For the infiltration of street runoff not only the volume ofwater but also the contamination load included has to be respected as the vast amount of infiltration water is recharging the groundwater body. In this study the treatment capabilities of bioretention filters is under investigation. For the experimental setup methods based on the Austrian standards are used and the ongoing development of appro- priate filter materials is supported by numerical modelling.