Water security is crucial for the sustainable and safe existence of both people and nature. Ensuring water security requires protection from floods and water scarcity, and the sufficient supply of freshwater of appropriate quality to ensure environmental and human health. The future of our society is less likely to be threatened by armed conflict, than by population growth, climate change, water shortages and pollution, as well as poverty and rising food prices. The water and environment research group focuses on developing the theory and tools needed to address the complex issue of water security in a changing world. The group consists of a multidisciplinary team of engineers and scientists who combine process understanding, mathematical modelling, and novel monitoring approaches and engineering principles to solve societal water problems.