This comprehensive treatment of water law has become a reference source and introduction to the subject for students and practitioners. The new edition adds dozens of recent decisions and key statutory changes. Virtually every principal case in the leading casebooks is cited or discussed, making it an excellent aid for students in any water law course. The revised book deals with changes in evolving areas such as groundwater-surface water conflicts, public recreational uses, in-stream flow protection, federal water development, takings claims, and public interest concerns.