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Modeling dune response using measured and equilibrium bathymetric profiles

By:
, ,
DOI: 10.1061/40926(239)69

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Abstract

Coastal engineers typically use numerical models such as SBEACH to predict coastal change due to extreme storms. SBEACH model inputs include pre-storm profiles, wave heights and periods, and water levels. This study focuses on the sensitivity of SBEACH to the details of pre-storm bathymetry. The SBEACH model is tested with two initial conditions for bathymetry, including (1) measured bathymetry from lidar, and (2) calculated equilibrium profiles. Results show that longshore variability in the predicted erosion signal is greater over measured bathymetric profiles, due to longshore variations in initial surf zone bathymetry. Additionally, patterns in predicted erosion can be partially explained by the configuration of the inner surf zone from the shoreline to the trough, with surf zone slope accounting for 67% of the variability in predicted erosion volumes.

Additional Publication Details

Publication type:
Conference Paper
Publication Subtype:
Conference Paper
Title:
Modeling dune response using measured and equilibrium bathymetric profiles
ISBN:
0784409269; 9780784409268
DOI:
10.1061/40926(239)69
Year Published:
2007
Language:
English
Publisher:
American Society of Civil Engineers
Contributing office(s):
Coastal and Marine Geology Program
Description:
14 p.
Larger Work Type:
Book
Larger Work Subtype:
Conference publication
Larger Work Title:
Coastal Sediments '07 - Proceedings of 6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes
First page:
897
Last page:
910
Number of Pages:
14
Conference Title:
6th International Symposium on Coastal Engineering and Science of Coastal Sediment Processes
Conference Location:
New Orleans, LA