Overview of the Colorado River Basin Water Supply and Demand Study Tanya Trujillo

1. Overview of the Colorado River Basin Water Supply and Demand Study Tanya Trujillo Executive Director Colorado River Board of California August 15, 2013 Urban Water Institute San Diego, CA

2. Colorado River Basin Supply and Demand Study • Focus on the “Next Steps” • Analyzed Options and Strategies to address the potential supply and demand imbalances • Options focused on the potential to increase supply and/or reduce demand • Limitations recognized in the Study – • Lower Basin Tributaries • Agricultural land use trends • Modeling limitations • Subjectivity • “Call to Action” = Continuation of Ongoing Efforts

3. Colorado River Basin Supply and Demand Study Basin States Commitments to Future Actions:

4. Colorado River Basin Supply and Demand Study • Basin States confirmed their commitment to future actions • Highlighted the potential for additional conservation and reuse and recognized the constraints • Focus on regional solutions – banking, weather modification • Desalination and importation – longer term • Basin Study is another tool the Basin States can use to plan for the future • Opportunity for continued partnership with BOR • Inclusion of other groups • Non-Governmental Organizations • Academic institutions • Trade organizations • Individual water users

5. Future Considerations and Next Steps Chapter 10 – Future Considerations: Water Use Efficiency and Reuse - workgroup Water Banks – Upper Basin study Water Transfers - workgroup Water Supply Augmentation – feasibility studies Watershed Management – prioritize target areas Tribal Water – DOI/Tribal effort Environmental Flows - workgroup Data and Tool Development – CRSS improvements Climate Science Research - updates

6. Moving ForwardNext Steps after the Study

7. Work Groups • Municipal and IndustrialConservation/Reuse Workgroup • Co-Chairs – Denver, MWD, AZ • Quantify Existing Conservation and Reuse • Categorize Savings by Types of Use • Highlight successful programs • Quantify Potential Additional Savings • Evaluate Additional Reuse Technologies • “Conservation” is part of “Supply” • Challenges – Not One Size Fits All

8. Work Groups • Agricultural Conservation/Transfers Workgroup • Co- Chairs – Colorado State, IID, BOR • Quantify existing conservation and transfers • Document impacts of conservation and transfers • Challenges

9. Work Groups • Environmental and Recreational Flows Workgroup • Chairs – Colorado, the Nature Conservancy, BOR • Identify potential modeling improvements • Coordinate with Landscape Conservation Cooperative project • Identify hydropower benefits and impacts • Challenges

10. Work Groups • Reports on Phase 1 by June 2014 • Map out strategies for Phase 2 • Challenges • Large group process • Local implementation • Need realistic goals/common understanding • July 16 Congressional oversight hearing

11. Local, Regional and Basin-Wide Options and Strategies

12. Questions???