Intended for a general audience, Water Law: Concepts & Insights provides both a general overview of basic water law doctrines and an exploration of how water law—the law and policies governing allocation of water—fit into broader ecological and environmental law issues. The book provides an overview of important hydrological principles before discussing the two state-law systems governing use of surface water in the United States and the five doctrines governing use of groundwater. It then explores the federal government's interests in the fresh waters of the United States, ranging from protection of navigability to federal water projects to federal water rights. Putting the law governing water use into a broader context, Water Law: Concepts & Insights then explores the intersections of state water law with energy policy and production, water quality protections, endangered species protections, and broader watershed management. It ends by returning to the concept of water rights as protected private property rights and the complexities of constitutional "takings" litigation when environmental protections interfere with those rights.