Seasonal Wave Climate Anomalies On The North Shore Indicative Of Erosion Conditions
Date
2022
Authors
Contributor
Advisor
Department
Instructor
Depositor
Speaker
Researcher
Consultant
Interviewer
Narrator
Transcriber
Annotator
Journal Title
Journal ISSN
Volume Title
Publisher
University of Hawaii at Manoa
Volume
Number/Issue
Starting Page
Ending Page
Alternative Title
Abstract
In recent years, ocean inundation has impacted local infrastructure at Sunset Beach, O`ahu especially when the beach is highly eroded. The objective of this thesis is to explain and identify potential drivers of erosion. Given a lack of sediment observations at Sunset Beach, this study uses a combination of numerical modeling, buoy observations, sediment characteristics, US Army Corps of Engineers Honolulu District’s remote sensing observations, and anecdotal evidence from local community observers to identify the erosion drivers. The seasonal cycle of the wave environment which drives the beach dynamics is dramatic, with large waves in December-March and small waves in May-August. This study relates seasonal wind, wave, and water level anomalies to the recent erosion and negligible erosion years using the various datasets. The wave and wind fields have the largest deviations from the climatological seasonal cycle in the May-August preceding the dramatic erosion which occurs during September-December. The largest and most significant changes are related to the local trade winds variability varying +14% to -23% from the climatological reference. These findings suggest the summer conditions help (or hinder) the beach recovery to endure (or suffer) the average erosive wave conditions experienced in the winter months.
Description
Keywords
Beach erosion, Sediment transport
Citation
Extent
Format
Geographic Location
Hawaii--North Shore (Oahu)
Time Period
Related To
Related To (URI)
Table of Contents
Rights
Rights Holder
Local Contexts
Collections
Email libraryada-l@lists.hawaii.edu if you need this content in ADA-compliant format.