The quest for sustainable management has stimulated a movement for greater recognition of private property rights to attain efficient use and allocation of water. The World Bank and the International Monetary Fund have encouraged nations in the developing world to conform to a market paradigm by privatizing their water supplies. Affected communities are often less than enthusiastic. Throughout the world, attempts to privatize water resources have triggered a "morality play of rights versus markets, human need versus corporate greed. " The controversy, however, is not limited to developing countries. One of the most divisive issues in contemporary natural resources law in the United States is whether interests in water are property. Absent legally recognized property rights, water markets are unlikely to thrive. According to the Restatement of Property, the term "property" describes "legal relations between persons with respect to a thing." Of course, not all economic relationships give rise to property rights. Judicial treatment of water is all over the map. The Court of Federal Claims awarded California irrigators millions of dollars as compensation for a regulatory taking of their water rights when flows were curtailed to protect endangered salmon, but a different panel of the same court subsequently took that opinion to task for failing to consider whether interests in water are property. Other federal and state courts have reached contradictory results as well.
To unbundle the concept of property in water, this Article uses a web of interests as a strong yet flexible metaphor for property, complemented by a patterning definition representing elemental strands of the web. If the interest in question is not an irrevocable interest in the exclusive possession and use of a discrete, marketable asset, it is not property for purposes of regulatory takings under the Fifth Amendment. Viewed through this lens, interests in water in most jurisdictions are not takings property, although they may be a form of property for purposes of due process or common law claims