Year

2024

Season

Fall

Paper Type

Master's Thesis

College

College of Computing, Engineering & Construction

Degree Name

Master of Civil Engineering: Coastal and Port Engineering (MSCE)

Department

Engineering

NACO controlled Corporate Body

University of North Florida. School of Engineering

Committee Chairperson

Dr. Raphael Crowley

Second Advisor

Dr. Christopher Bender

Rights Statement

http://rightsstatements.org/vocab/InC/1.0/

Third Advisor

Dr. Cigdem Akan

Department Chair

Dr. Alan Harris

College Dean

William Klostermeyer

Abstract

This study investigates shoreline erosion at Brickhill Bluff along the Brickhill River in Cumberland Island National Seashore using ADCIRC. Two scenarios were modeled during this research: bed stresses during regular tidal cycles and bed stresses during worst-case storm (i.e., hurricane) conditions. Velocities from these models were used to compute bed shear stresses and these stresses were compared to site’s sediment critical shear stress. Results appear to show that a meander in the Brickhill River causes relatively high (i.e., on the order of 0.27 ��/��2 ) shear stresses during regular tidal cycles and even higher (i.e., on the order of 0.56 ��/��2 ) stresses during worst-case storm events. When compared to the sediment critical shear stress (on the order of 0.03 ��/��2 ), these data suggest that the chronic erosion that has been observed at Brickhill Bluff will likely continue if mitigation measures are not implemented. And, these data suggest that any mitigation measures that are taken to reduce erosion at Brickhill Bluff would need to be significant in the context of either reducing stress or providing soil retention for the eroding shoreline.

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