Shoaling of Kaneohe Bay, Oahu, Hawaii, in the period 1927 to 1976, based on bathymetric, sedimentological and geophysical studies
Date
1977-05
Authors
Contributor
Advisor
Department
Instructor
Depositor
Speaker
Researcher
Consultant
Interviewer
Narrator
Transcriber
Annotator
Journal Title
Journal ISSN
Volume Title
Publisher
University of Hawaii, Honolulu
Volume
Number/Issue
Starting Page
Ending Page
Alternative Title
Abstract
A comparison of a 1976 bathymetric survey of Kaneohe Bay, Oahu, Hawaii, with that of a 1927 survey indicates that there has been an average shoaling of the lagoonal area by 3.3 feet. Shoaling for the north and middle bay at 1.4 ft/49 years is at a considerably lower rate than for the south bay at 5.2 ft/49 years. Sedimentological studies, based on dredging history and detailed chemical, mineralogical and grain-size analyses of 251 bottom samples, suggest that the total volume of fill into the bay during the 49 year period is approximately 25,500,000 cubic yards. Of this amount, approximately 63% is carbonate detritus from the barrier, fringing, and patch reefs as well as by the living corals, 11% is dredging spoils, and the remaining 27% is attributed to terrigenous detritus. The terrigenous fraction, contributed primarily by stream loading and sheet-wash, brings approximately 69,300 tons of sediment to the lagoon per year. Seismic reflection profiles, which span the length of the bay and include additional lines in the south bay, show that most of the infilling material is unconsolidated sediment trapped between and burying coralline structures built during ancient, lower stands of the sea. All information suggests that shoaling rates within the bay have increased since 1927 due to higher stream loads from increased urbanization as well as to extensive dredging and disposal operations. This is particularly evident in the area of the south bay.
Description
Keywords
Kaneohe Bay (Hawaii)
Citation
Hollett, Kenneth J. Shoaling of Kaneohe Bay, Oahu, Hawaii, in the period 1927 to 1976, based on bathymetric, sedimentological and geophysical studies. Honolulu: University of Hawaii, 1977.
Extent
157 pages
Format
Geographic Location
Hawaii--Oahu
Time Period
Related To
Theses for the degree of Master of Science (University of Hawaii at Manoa). Geology and Geophysics; no. 1460
Related To (URI)
Table of Contents
Rights
All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.
Rights Holder
Local Contexts
Collections
Email libraryada-l@lists.hawaii.edu if you need this content in ADA-compliant format.