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September 4, 2012 California Department of Water Resources

Central Valley Floodplain Evaluation and Delineation (CVFED) Program Presented for the FMA 2-D Modeling Symposium. September 4, 2012 California Department of Water Resources. CVFED Principle Objectives.

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September 4, 2012 California Department of Water Resources

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  1. Central Valley Floodplain Evaluation and Delineation (CVFED) Program Presented for the FMA 2-D Modeling Symposium September 4, 2012 California Department of Water Resources

  2. CVFED Principle Objectives • Develop foundational datasets, models, and tools to support legislative mandates and other FloodSAFE Programs • Develop informational floodplain maps and provide necessary information to cities and counties for their determinations related to urban level of flood protection • Develop new hydraulic models acceptable to USACE and FEMA • Provide information to support future planning studies and projects

  3. CVFED Product Delivery Team

  4. CVFED Study Area

  5. CVFED Model Approach and Platforms • Calibrated 1-D riverine models for the State Plan of Flood Control systems (HEC-RAS) • 2-D hydraulic models representing floodplains outside of the riverine systems (primarily FLO-2D)

  6. CVFED 2-D Model Purpose • Primarily to perform floodplain delineations and overbank flood flow routings • To help define storage areas for riverine HEC-RAS models

  7. CVFED FLO-2D Model Construction • Grid set-up • Hydraulically significant overbank features such as levees, roads, and other embankments and openings • Hydraulically significant overbank streams or interior drainage canals

  8. CVFED FLO-2D Model Domains • FLO-2D Model Domains • 25 domains • Five modeling teams • Approximately 6,850 square miles *Preliminary as of 6/19/2012.

  9. CVFED 2-D Model Domains *Preliminary as of 6/19/2012.

  10. Addressing Modeling Challenges • Multiple Teams • Four geographic regions assigned to separate engineering support teams based upon their experience and knowledge of the study area • Program Management team to support DWR • Formation of H&H Coordination Work Group to discuss and share technical issues and how to resolve • Establish Program Guidelines, Standards and Procedures

  11. Addressing Modeling Challenges • Model Development Time • Developed Tools to Increase Efficiency and Improve Accuracy • FLO-2D GDS • FLO-2D Workshop with Software Developers

  12. Addressing Modeling Challenges • Formalize QA/QC Review Process • Checklists tracking QC and QA comments and resolution • Development of SharePoint site • Bi-Weekly Model Review Meetings

  13. Addressing Modeling Challenges • Models, Technical Memorandums and Workmaps • Documentation acceptable to FEMA, USACE and DWR • Accessible in DWR Library of Models and intended to support future users of the models

  14. Questions & CommentsFor more information contact:Yiguo Liangyliang@water.ca.gov916.574.1408

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