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Delta Rick Management Strategy

The Delta Risk Management Strategy (DRMS) meeting held on February 27, 2007, addressed ongoing efforts to assess the risks facing Delta levees, including subsidence, earthquakes, floods, and climate change. This meeting outlined the framework established by AB 1200, emphasizing the need for a robust risk analysis and development of management strategies. The DRMS phases involve comprehensive evaluations by various experts, with reports due in 2008, aimed at enhancing water supply quality, protecting the Delta ecosystem, and ensuring the resilience of infrastructure.

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Delta Rick Management Strategy

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  1. Delta Rick Management Strategy CWEMF Annual Meeting – DRMS Discussion 02/27/2007 Delta-Suisun Marsh Branch Department of Water Resources

  2. DRMS Development of DRMS • 2000 CALFED ROD Called for Risk Assessment of Delta Levees • 2005 – Levee Risk Analysis Team • Did Preliminary Work – Seismic only • Also Developed Project Scope for DRMS • 2005 – AB 1200 Enacted

  3. DRMS • AB 1200 (CWC 139.2) Sets General Framework for DRSM • DWR Shall Evaluate Potential Impacts on 50, 100, 200-year projections on possible impacts to Delta from: • Subsidence • Earthquakes • Floods • Climate Change • & Combination of above

  4. DRMS • AB 1200 Continued (CWC 139.4) • DWR/DFG to Determine Principal Options for Delta – DWR to comparatively rate for ability to: • Prevent Disruption of Water Supplies Derived from Delta • Improve the Quality of Water Supplies Derived from Delta • Reduce Salts, Maintain Water Quality • Preserve, Protect, Improve Delta Levees • Protect Water Rights/Environments of River Systems • Protect Infrastructure within Delta • DFG shall rate all options for its ability to restore salmon & other fisheries that use the Delta • Report Due – January 2008

  5. DRMS • Contract Information • URS Corporation, Oakland, CA • Over 20 subcontractors • Contract is for $10,000,000 • Approved by DGS - March 6, 2006 • 3-year contract • Includes a new LiDAR aerial survey of Delta

  6. DRMS • Technical Advisory Committee: • Dr. Raymond Seed, University of California, Berkeley • Dr. Norm Abrahamson, Independent Seismological Consultant • Gilbert Cosio, P.E., MBK Engineers • Dr. Wim Kimmerer, San Francisco State University, ERP Science Board • Dr. Peter Moyle, University of California, Davis, ERP Science Board • Roger Fujii, United States Geological Survey • Jon Burau, United States Geological Survey

  7. DRMS STEERING COMMITTEE Includes Members Representing: • TAC Members • USACE • DFG • CBDA • USBR • Delta/Suisun Marsh Experts • Public • SWC • CVP Contractors

  8. DRMS Phase 1 • Development of a Risk Analysis to Evaluate the Impact to Delta Levees from: • Floods • Earthquakes • Subsidence • Normal Conditions • Climate Change • Determine Consequences to Economy & Eco-System based on Risks Found • Risk Assessment Report due mid-March ’07 • Public Draft mid-April 2007 • Independent Review by CALFED – Apr – Jun ‘07

  9. DRMS Phase 2 • Development of Risk Reduction/Risk Management Strategies for Long-Term Management of Delta • Draft Final Report Due August ’07 • Public Review Draft – Sep ’07 • Independent Review by CALFED – Sep – Nov ’07 • DRMS Final Report – NLT Jan 1, 2008

  10. DRMS • Independent Review Panel (IRP) • CALFED ISB Assembled appropriate review team • IRP members will meet w/ consultant team, DWR/DFG/COE, TAC/SC members, others • Review methods, analyses & findings • Review Phase 1 and 2 Reports • Produce formal reports on findings

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