This book provides a detailed description of riverine ecosystem management concepts and strategies for aquatic resource managers and others involved in the determination of instream flow needs and water management. This revised edition is fully illustrated and cites over 600 references to provide a comprehensive treatment of riverine ecology, the role of the public, and legal aspects of river management. The book contains 46 policy statements related to program development and study design and includes descriptions and critical opinions of 34 instream flow methods.