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How is DWR Responding to Climate Change

How is DWR Responding to Climate Change. Sanjaya Seneviratne CWEMF November 21, 2003. Outline. Address Climate Change in the California water Plan A simplified approach to account for changes in run off due to Climate Change Case Study ( In-Delta Storage). California Water Plan - Outline.

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How is DWR Responding to Climate Change

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  1. How is DWR Responding to Climate Change • Sanjaya Seneviratne • CWEMF • November 21, 2003

  2. Outline • Address Climate Change in the California water Plan • A simplified approach to account for changes in run off due to Climate Change • Case Study ( In-Delta Storage)

  3. California Water Plan - Outline • DWR Policy on Climate Change • How is DWR incorporating Climate Change into its activities. (SWP Report, B118, JACT initiatives, Water Plan ) • Water Plan Recommendations—(draft) Chapter 3

  4. DWR Policy on Climate Change • 2001—New DWR management directive on Climate Change • Consistent with the policies of other State agencies. • Will be addressed as a significant issue in the California Water Plan Update 2003

  5. Climate Change Impacts • Temperature projection 1.4 to 5.8C (2.5 to10.4 F) • Reduced Sierra Snow Pack • April-July Runoff Reduction by 2090 (Using+2.1C or 3.8F) • Sacramento Region ---43 percent • Southern Sierra—23 percent • More precipitation falls as rain • Earlier spring snow melt • More Extreme Storms (climate variability) • Rising Sea Level • Coastal areas, groundwater, Delta levees (tides) and water quality effects • Projections range from 7 inches to 35 inches rise

  6. . . • . Van Rheenen, N.T., A.W. Wood, R.N. Palmer and D.P. Lettenmaier, 2004

  7. California Climate Initiative • Formation of a Joint Agency Climate Team • Members • Resources Agency (CEC, DWR, Forestry, F&G) • CALEPA (Air Resources Board, SWRCB, Integrated Waste management • Department of Transportation • Food and Ag, Trade & Commerce • Governor’s Office—Planning & Research • Initiatives focus on reduction of GHG emissions and adaptation to Climate Change

  8. JOINT AGENCY CLIMATE TEAMCLIMATE CHANGE INITIATIVESDWR • Collect Better Hydrologic and Environmental Data • Enhance Water Management Planning Capacity

  9. Water Plan • Acknowledgement of climate change • Educate public • Lay foundation for future research • What can we do now • Identifying a process for planners to consider climate change—climate variability • Look at risk/tradeoffs—protection of investments, public safety,--incremental cost of added protection

  10. Advisory Committe (65) Extended Review Forum (320) Climate Change Work Group Staff Water Plan

  11. California Water PlanPublic Advisory Committee Stakeholder Views • Is global warming occurring? • Belief in climate change but not from man made causes • Can not plan or prepare for climate change • Need only look at no-regret strategies • Not an issue

  12. Traditional Approach to Hydrology, Water Resources, and Climate • The classical assumption is equivalent to statistically stationary, “the future will resemble the past” • Assumes sufficient time and information is available to respond to climate change • Assumes no special effort is required to protect against surprises

  13. Water Plan RecommendationsStakeholder Briefing Draft • Addressed in the Context of Planning For an Uncertain Future http://www.waterplan.water.ca.gov/b160/workgroups/chapterreviewgroup.htm

  14. Enhance existing monitoring program that will verify past data trends and help validate models for evaluating climate change impacts. An enhanced monitoring program will help to build more accurate tools for predicting impacts at regional and local scales.

  15. Incorporate flexible and robust climate change response strategies to the extent possible into the design, planning, and operation of systems.

  16. Funding for federal, state and local agencies to develop strategic plans for dealing with climate change.

  17. The State should support efforts to enhance public awareness about climate change and make information readily available.

  18. Other than develop a strategic plan, what has DWR done about Climate Change ?

  19. Outline • Address Climate Change in the California water Plan • A simplified approach to account for changes in Run off due to Climate Change • Case Study ( In-Delta Storage)

  20. Climate Change in california August 31, 2001 Management Development Team Project Gary Bardini Sergio Guillen Bob Pierotti Heridi Rooks Sean Sou

  21. Average monthly volume distribution • V(2000-1951) – V (1950-1900)

  22. Comparison of Water Supply Impacts from CALSIM Studies

  23. Outline • Address Climate Change in the California water Plan • A simplified approach to account for changes in Run off due to Climate Change • Case Study ( In-Delta Storage)

  24. Re-engineered Delta Wetlands ProjectBacon and Webb (Storage) Holland and Bouldin (Habitat)

  25. Summary Of Climate Change Study Results

  26. VISION for 2008 CWEMF Water Plan Sub Committee Training, New Models, Large Modeling Efforts, Modeling User Groups

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