U.S. Bureau of Reclamation (USBR) | August 8th, 2015
Summary
The Truckee River Basin (Basin) provides a compelling demonstration for how changes in demands and/or a region’s climate could influence both natural and human water us
The Truckee River Basin (Basin) provides a compelling demonstration for how changes in demands and/or a region’s climate could influence both natural and human water uses. Packed into this relatively small Basin is every form of water use and every type of water user that exists in the Western United States, including: tribal lands and trusts; irrigated agriculture; municipalities and industry; mining and geothermal energy exploration; Federal water projects; hydropower generation; lake, stream, and reservoir recreation; and restoration efforts for diminished wetlands and endangered aquatic species. Correspondingly, the diversity of water uses within its borders has made the Basin home to every type of water resources conflict.
Despite this natural conflict, communities in the Basin have actively managed and adapted to water scarcity for as long as the arid region has been inhabited. Management activities include a number of massive water resource facilities, built through both Federal and local investment over the past century-and-a-half. In parallel with the construction of these facilities, regulations to govern their use have been promulgated in response to demands and to provide the flexibility to deal with highly variable weather patterns.
Thus, like many basins in the West, water management practices, including diversion regulations, have been developed through a century of infrastructure improvements followed by decades of litigation. But unlike most basins, the closed hydrologic condition of the Basin creates a zero-sum game for water. The Truckee River has never had surplus water: each drop from its headwaters at Lake Tahoe to its terminus at Pyramid Lake serves important human uses and ecological functions. As a result, even small changes in future conditions (e.g., increases in demand or changes in climate) are perceptible and potentially contentious.