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Water/Energy Nexus

Dramatic population growth in the West highlights the unmistakable link between energy generation and water use.  New coal plants divert and consume significant volumes of water for cooling.  By comparison, wind and solar arrays use virtually no water.  Thus, our choices for energy generation may create a large water footprint, as well as a large carbon footprint, preventing water from being put to other uses, including meeting environmental needs.

WRA has launched a new project to examine how different energy development scenarios affect water resources at the river basin- and state-wide level. The analysis will chart possible outcomes of competing demands for water, including electricity generation, irrigation, ethanol production, municipal water supply, and increasing rates of evapo-transpiration predicted by the National Oceanic and Atmospheric Administration.  In 2008, we will complete two case studies: one for the Arkansas River basin in Colorado and the second for the State of Nevada.  The studies were chosen to match existing Energy Program campaigns, thus providing an interesting cross-over between the two programs. We expect that the template of impacts and options from these case studies will be applicable to many other parts of the West.

Climate Change and Water

Climate change is exacerbating the impacts of a growing population on western rivers.  It creates new uncertainties for water planners whose water rights and storage facilities may generate less water, and at different times of the year, than in the past.  In 2007, we partnered with state agencies, water utilities and other experts on the Colorado Water Adaptation Group, and co-authored recommendations to the state Climate Action Panel which, in turn, provided a suite of recommendations to state executive and legislative branches.  Building upon the expertise and connections developed in this work, we will spend considerable time in 2008 crafting and advocating for policy changes to reflect the heightened importance of conservation and efficiency in the face of climate change.

The Last Straw: Water Use by Power Plants in the Arid West

Fossil-fueled power plants are widely recognized as major sources of air pollutants that damage human health and the environment. But they also have a significant impact on water, both as large users and polluters. Water has always been scarce in the West, resulting in fierce competition between various users, such as irrigators, industries and cities. Due to widespread drought conditions, water is becoming increasingly valuable and its use increasingly contentious. As a result, Western communities are now reassessing how best to use this vital resource.

The Last Straw, co-authored by WRA and Clean Air Task Force describes practical opportunities to reduce both water use and water quality impacts from power generation. It examines the close relationship between power generation and water, including water use effects on competing uses, water quality and power system reliability.

The report sets out an action agenda that covers fossil-fuel generation, renewable energy, and energy efficiency. If implemented, this agenda will minimize the impacts from water used for power generation, while ensuring power system reliability, conserving scarce water resources, and protecting rivers, streams and groundwater from unnecessary discharges.
View the report pdf(509kb)

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