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State Water Project Delivery Reliability Report 2011 - Aug. 23, 2012
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State Water Project Delivery Reliability Report 2011 - Aug. 23, 2012

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  • 1. Imported Water Committee August 23, 2012
  • 2.  Department of Water Resources oversees management of the State Water Project’s supply and delivery system  Reliability Report prepared as a result of the state’s obligation set forth in the 2003 Monterey Settlement  Reliability Report provides:  Overall water delivery capacity of the SWP facilities  Allocation of SWP water  Discussion of the range of hydrologic conditions  Historic SWP water delivery (prior 10 years) 2
  • 3.  29 SWP Contractors receive Annual Allocations  Largest Table A amount held by MWD at 1.91 MAF (or 46%)  SWP contractors repay principal and interest on bonds and maintenance and operation costs 3 MWD 1.91 MAF 28 Other Agencies 2.26 MAF
  • 4.  Water availability at the source  Water rights with priority over the SWP  Regulatory restrictions on SWP Delta exports  Climate change  Environmental and policy planning efforts  Delta levee failure 4
  • 5. 0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 5 SWP Delivery Year 39% 70% 90% 65% 90% 100% 60% 35% 40% 50% X% = Table A Allocation = Historical Delivery = Estimated Average Delivery 80% Maximum Possible SWP Table A Delivery (4,133 TAF/Yr) 10-Yr Avg Delivery (2001-2010)
  • 6. 2,958 2,736 2,597 2,607 2,818 2,595 2,483 2,524 0 500 1,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 2005 2007 2009 2011 Annual Delta Exports (inc. Article 21 Water) Annual Table A Deliveries TAF/Yr Maximum Possible SWP Table A Delivery (4,133 TAF/Yr) 6 Delivery Reliability Reports Implementation of 2007 Federal Court Decision of Remedy Action for Delta Smelt Changed conditions imposed under Biological Opinions USF&WS (2008) and NMFS (2009) Impacts Unchanged from 2009
  • 7. 7 Delivery Reliability Reports 0 500 1,000 1,500 2,000 2,500 3,000 3,500 2005 Report 2007 Report 2009 Report 2011 Report TAF/Yr 2,521 3,298 2,880 2,55080 % Reliability 61 % Reliability
  • 8. 0 5 10 15 20 25 30 35 40 500-1,000 1,000-1,500 1,500-2,000 2,000-2,500 2,500-3,000 3,000-3,500 3,500-4,000 4,000-4,106 More than 4,106 Existing Conditions Future Conditions Annual Exports (thousand acre-feet) LikelihoodofDelivery(%) Note: Maximum Annual SWP Exports from the Delta is 4,133 MAF Approximately 79% chance of annual Delta exports of 2,000-3,500 thousand acre-feet under existing conditions, reduced to approximately 76% under future conditions
  • 9. The report illustrates “The need for local agencies to develop a resilient and robust water supply, and a distribution and management system to maximize the efficient use of our variable supply” and “the urgent need to improve the method of conveying water past the Delta in a more sustainable manner that meets the dual goals of increasing water delivery reliability and improving conditions for endangered and threatened fish species.” -- DWR Director Mark Cowin 9
  • 10.  Future SWP deliveries average about 61% of the contracted amount (including Article 21 and carryover supplies)  MWD’s 2010 UWMP and the Table A 2030 volumes are consistent with the 2011 Report results for 2031.  DWR will continue to perform assessments of SWP supplies and operations  Next SWP Delivery Report will be released in 2014  Water Agencies to prepare 2015 Urban Water Management Plan Updates  Staff will continue to monitor and report to the Board actions that could affect imported water 10
  • 11. 12 Estimated Future SWP Exports (TAF) Water Year Type 2009 Report 2011 Report Wet 3,196 (77%) 3,182 (77%) Above Normal 2,734 (66%) 2,753 (67%) Below Normal 2,557 (62%) 2,556 (62%) Dry 2,173 (53%) 2,120 (51%) Critical 1,526 (37%) 1,414 (34%) Average 2,550 (62%) 2,521 (61%)

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