This research paper from Lake Tegel in Berlin, Germany, describes how water warming through climate change can lead to large-scale changes in natural self-purification capacities during bank filtration, such as decrease in redox potential and the development of anoxic conditions. Rather suited for people with biochemical knowledge.
GROSS-WITTKE, A. GUNKEL, G. HOFFMANN, A. (2010): Temperature Effects on Bank Filtration: Redox Conditions and Physical-chemical Parameters of Pore Water at Lake Tegel, Berlin, Germany. London: IWA Publishing URL [Accessed: 29.08.2011] PDF