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Impact of Climate Change on the Quality of Urban and Coastal Waters - Diffuse Pollution (diPol). Case site Göteborg, Sweden. Urban groundwater impact

Swedish title: Impact of Climate Change on the Quality of Urban and Coastal Waters - Diffuse Pollution (diPol). Case site Göteborg, Sweden. Urban groundwater impact
Author Thomas Rihm, Gunnel Göransson
Series: SGI Varia
Number: 633
Year: 2012
Pages: 56
Download (PDF, 3.74 MB)
Summary As the central parts of the Göteborg city to a large extent is built on filling materials from various origin, there may be a pollution potential emanating from earlier as well as on-going urban activities. Earlier investigations on groundwater observation wells in the city centre and in the outskirts of Göteborg have been used as well as earlier investigations on groundwater leaking into the stormwater pipe systems in periods of dry whether (drainage water). Complementary analyses of drainage water have been carried out and comparisons have been made between water from observation wells and drainage water. Comparisons have also been made with stormwater and treated sewage water. The pollution load from the different types of water has then been assessed. The investigations indicate that the pollution load from the urban groundwater is not generally a great problem. Most of the pollutions from the city seems to emanate from precipitation, corrosion of building materials, and present anthropogenic activities, e.g. traffic, which are transported by the stormwater to the Göta River and its estuary. A good strategy to prevent the Göta River estuary from urban pollutants is to take further measures to reduce the pollutants in the stormwater.