Stephen Trudgill presents an internationally authored research-level text, aimed at providing a synopsis of developments in solute modelling in catchment ecosystems over the last ten years. The volume includes particular advances in solute modelling, especially at the catchment scale, emphasising the influences of weathering, ecosystem processes and hydrological processes as well as the application of models and modelling principles. The intended audience for the book is research scientists in cognate fields and postgraduate research workers, although it is especially aimed at those interested in catchment systems. It will also enable specialists to grasp the essentials of topics outside their own field. The book will be of use in a management context as successful water quality management actions are often dependent upon the predictive success of models. It will also show how models can be used to assess the sensitivity of solute production to environmental change and human influence, such as land use change and variation in atmospheric inputs, focussing upon surface catchments rather than groundwater and soil solutes.