Interdisciplinary research and transdisciplinary processes as part of environmental management respond to the increasing complexity of socio-natural changes in recent decades. Two similar studies of eutrophication in raw water reservoirs for drinking water production in Norway and China are used to discuss interdisciplinary research and transdisciplinary processes organised through the DPSIR framework (drivers, pressures, states, impacts, and responses) as instruments for environmental management. The conclusion is that interdisciplinary research and transdisciplinary processes can enhance the understanding of complex socio-natural processes under distinctly different institutional systems. The DPSIR framework was not necessary for achieving the desired result.