This handbook explores the history of why our river catchments are in their current condition, the nature of the threats and challenges they face and sets out in practical terms some of the solutions we have to restore them. It also sets out the governance structure that has evolved to address these problems and where the various funding comes from to deliver change. The WATER (Wetted land: The Assessment, Techniques & Economics of Restoration) project is a €3.9 million programme funded by the France (Channel) England Interreg IVA Programme and led by the Westcountry Rivers Trust, which aims to revolutionise the way we restore and manage our environment by developing innovative funding mechanisms.