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Title: Sabine Pass to Galveston Bay, TX Pre-construction, Engineering and Design (PED) : coastal storm surge and wave hazard assessment : report 3 – Orange County
Authors: Stehno, Abigail L.
Melby, Jeffrey A.
Nadal-Caraballo, Norberto C.
Gonzalez, Victor M.
Misra, Shubhra
Keywords: Galveston Bay (Tex.)
Orange County (Tex.)
Sabine Pass (La. and Tex.)
Storm surges--Models
Water waves
Publisher: Coastal and Hydraulics Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: Technical Report (Engineer Research and Development Center (U.S.)) ; no. ERDC/CHL TR-21-15
Abstract: The US Army Corps of Engineers, Galveston District, is executing the Sabine Pass to Galveston Bay Coastal Storm Risk Management (CSRM) project for Brazoria, Jefferson, and Orange Counties regions. The project is currently in the Pre-construction, Engineering, and Design phase. This report documents coastal storm water level (SWL) and wave hazards for the Orange County CSRM structures. Coastal SWL and wave loading and overtopping are quantified using high-fidelity hydrodynamic modeling and stochastic simulations. The CSTORM coupled water level and wave modeling system simulated 195 synthetic tropical storms on three relative sea level change scenarios for with- and without-project meshes. Annual exceedance probability (AEP) mean values were reported for the range of 0.2 to 0.001 for peak SWL and wave height (Hm0) along with associated confidence limits. Wave period and mean wave direction associated with Hm0 were also computed. A response-based stochastic simulation approach is applied to compute AEP values for overtopping for levees and overtopping, nappe geometry, and combined hydrostatic and hydrodynamic fluid pressures for floodwalls. CSRM crest design elevations are defined based on overtopping rates corresponding to incipient damage. Survivability and resilience are evaluated. A system-wide hazard level assessment was conducted to establish final recommended system-wide elevations.
Description: Technical Report
Gov't Doc #: ERDC/CHL TR-21-15
Rights: Approved for Public Release; Distribution is Unlimited
Appears in Collections:Technical Report

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ERDC-CHL TR-21-15 Report 3 Appendix D.pdf932.87 kBAdobe PDFThumbnail
ERDC-CHL TR-21-15 Report 3.pdf21.34 MBAdobe PDFThumbnail