Débordements d'égouts unitaires et protection des sources d'eau potable: intégration des changements globaux

Water quality is directly linked to its environment. In older urban areas, water quality can be degraded by the outfalls of untreated wastewater from combined sewers and is of concern if these waters are used as drinking water sources. Moreover, this degradation can be accelerated by global changes such as climate change and population growth. In addition, the intensification of rainfall events, as predicted by several studies, will increase the number of fecal contamination events. Yet, few studies have quantified the impacts of global changes on microbial water quality of drinking water sources. In this study, we applied a georeferenced hydrodynamic model, which enabled us to characterize the impacts of global changes in an urban area, through different scenarios. The river studied here is located in the south of the province of Quebec, between two highly urbanized municipalities.