This poster presents early stage researcher (ESR) project 10, embedded in the MANTEL (Management of Climatic Extreme Events in Lakes & Reservoirs for the Protection of Ecosystem Services) Marie Skłodowska-Curie Action European Joint Doctorate Innovative Training Network (MSCA-EJD ITN). Using time series modelling of high frequency measurement (HFM) data, large-scale mesocosm experiments (1000L) and field studies we will assess the water quality and resilience potential of lakes and reservoirs to gain a much-needed deeper understanding and to identify mitigation approaches of effects of extreme weather.