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Water Supply & Demand Committee

Water Supply & Demand Committee. WRDC Report 4/15/2011 Co-Chairs: Leslie Meyers (USBOR) & Ron Doba (NAMWUA ) Subcommittee Chairs: Christine Nuñez, Lyn White, Cliff Cauthen, Tim Skarupa Inter Tribal Council Liaison: Norm DeWeaver

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Water Supply & Demand Committee

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  1. Water Supply & DemandCommittee WRDC Report 4/15/2011 Co-Chairs: Leslie Meyers (USBOR) & Ron Doba (NAMWUA) Subcommittee Chairs: Christine Nuñez, Lyn White, Cliff Cauthen, Tim Skarupa Inter Tribal Council Liaison: Norm DeWeaver ADWR Staff Liaisons: Frank Corkhill, Don Gross, Dianne Yunker, Michael Johnson, Laura Grignano, Gerry Wildeman

  2. WS&D Committee Organization

  3. Municipal Subcommittee The Municipal Subcommittee work (draft) is complete. Projections are based on GPCDs calculated from Atlas and population committee data. The mid-population projection is used for the purpose of projecting future water demands. The final draft report is posted on the DocuShare site.

  4. Municipal Projections

  5. 2010 Census Data

  6. 2010 Census Data • 2010 Census 6,392,017 (4% lower than anticipated) • Immigration laws • Recession • Communities over estimating growth • 2010 Census Split population data used by WS&D Committee to establish demand Low – 6,589,080 Med – 6,628,757 High – 6,685,863

  7. Agricultural Subcommittee The Agricultural Subcommittee work (draft) is complete. The projections “flat line” with the exception of the AMAs, Yuma and Lower Gila basins. Dairy and feedlot projections completed and provided to Industrial Subcommittee. The projection spreadsheets are posted on the DocuShare site.

  8. Agricultural Projections

  9. Industrial Subcommittee The Industrial Subcommittee work (draft) is complete. Includes dairy and feedlot projections from the Agriculture Subcommittee (dairies relocated, new pig feeder). Projections are provided as low and high for each time period, causing total demand projections to follow. Reports from individual sectors are posted on the DocuShare site.

  10. Industrial Projections

  11. Demand Projections

  12. Demand Projections

  13. Tribal Water Needs • Water Atlas includes tribal water estimates. • Some tribes have indicated they had little input and the Atlas may not correctly represent populations and water use. • Inter Tribal Council of Arizona • Draft Report Projecting Tribal Water Use identifying settlement water amounts for tribes. Draft report located on DocuShare site. • Report reviewed by Navajo, BOR, and ITC.

  14. Tribal Water Needs Pascua Yaqui Tribe have submitted a letter claiming a right to 3,520 AF of water in the Gila River Adjudication not previously identified. Yavapai-Apache Nation have submitted a letter claiming a right to 6,848 AF of water in the Gila River Adjudication not previously identified. The report from the WS&D Committee will include a table that identifies tribal water claims in each basin. Tribal water settlement amounts will be considered in the determination of future available water supplies.

  15. Tribal Water Needs DRAFT

  16. Supply Subcommittee Draft baseline supply determinations have been completed. Projected supply as a result of climate change is not completed. Conservation, additional effluent, increased groundwater pumping and water importation will be considered for future supplies and have not been determined.

  17. What’s Left To Do? • Peter Culp is running the Central Arizona Water Demand Model for the Phoenix, Tucson and Pinal AMA’s. We hope to be able to compare the results by 4/22/2011. • Complete supply shortage projections. • Incorporate Environmental data into WS&D report. • Identify sources of supply that can be used to meet future demands (conservation, additional groundwater pumping, importation, etc.). • Evaluate legal and/or technical issues with accessing identified supplies. • Determine how basins with projected water shortages will be identified in report. • Complete the report(s) from WS&D Committee.

  18. Next WS&D Meeting May 2nd

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