This book was designed for use by anyone who is interested in reservoir water quality. The book specifically stresses reservoirs as opposed to lakes, however, reservoirs and lakes have much in common and reservoirs are considered transitional between rivers and lakes. Thus rivers and their respective watersheds play an important role in the reservoir water quality. The authors attempted, as much as possible, to balance attention to different aspects. An important element of this book that differentiates it from similar efforts is the presentation of knowledge about both temperate and tropical regions.