The Regulated Riparian Model Water Code incorporates ideas from engineers, government administrators working with water, lawyers representing environmental and developmental interests, business people, and academics interested in improving the administration of water allocation laws in the United States. The main threats to availability of water and how regulated riparian statutes create mechanisms for long-term planning and providing for the public interest are covered as well as resolving quantitative conflicts. Topics include declarations of policy, general obligations and prohibitions, waters subject to allocation, protection of minimum flows or levels, administrative authority, planning responsibilities, disputes and enforcement, establishing a water right, scope of the water right, multijurisdictional transfers, and water conservation and supply augmentation.