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Coastal Processes Analysis for Vilano Beach, St. Johns County, FL Taylor Engineering, Inc.

Coastal Processes Analysis for Vilano Beach, St. Johns County, FL Taylor Engineering, Inc. Hande Caliskan, M.Sc. Christopher Bender , Ph.D., P.E., D.CE Michael Krecic, P.E. U.S. Army Corps of Engineers, Jacksonville District, FL Jason Engle, P.E. OVERVIEW. Project Description Purpose

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Coastal Processes Analysis for Vilano Beach, St. Johns County, FL Taylor Engineering, Inc.

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  1. Coastal Processes Analysis for Vilano Beach, St. Johns County, FL Taylor Engineering, Inc. Hande Caliskan, M.Sc. Christopher Bender , Ph.D., P.E., D.CE Michael Krecic, P.E. U.S. Army Corps of Engineers, Jacksonville District, FL Jason Engle, P.E.

  2. OVERVIEW • Project Description • Purpose • Project Site • Study Approach • GenCade SMS Interface • Data • Calibration/Verification • Procedure • Results • Sensitivity Analysis • Summary and Results

  3. PROJECT DESCRIPTION

  4. PURPOSE • USACE Jacksonville District is conducting a Hurricane and Storm Damage Reduction Study • The GENESIS Model will provide erosion rates for beach nourishment alternatives

  5. PROJECT SITE

  6. STUDY APPROACH

  7. R-64 R-94 Regional Contour R-69 R-99 Initial Shoreline R-104 R-74 Wave Stations R-109 R-79 R-114 GENESIS Grid R-84 R-119 R-89

  8. DATA • Florida Coastal Forcing Project (FCFP) Wave Data for Saint Johns County, FL • FCFP Data at every 5th nearshore station • FDEP Historical MHW and Beach Profile Data

  9. CALIBRATION

  10. R-84 R-84 Small MHW Shoreline Change Large Volume Change

  11. R-114 Small MHW Shoreline Change Large Volume Change

  12. SENSITIVITY ANALYSES

  13. Model Parameters

  14. SUMMARY AND RESULTS

  15. The shoreline change modeling component of the St. Johns County, Florida Hurricane and Storm Damage Reduction Feasibility Study developed and calibrated a GENESIS model for the study area (R-84 in South Ponte Vedra Beach southward to R-121 in Vilano Beach north of St. Augustine Inlet). • The study applied the GENESIS model within the GenCade regional sediment management tool developed by the USACE ERDC. • The calibrated and verified GENESIS model results agree well with measured beach volume changes during the calibration period (July 1986 to January 1999). • The model produces reasonable agreement with measured volume changes during the verification period (January 1999 to August 2007) • Additional model simulations documented the calibrated and verified GENESIS model sensitivity to selected model parameters.

  16. QUESTIONS???

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