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A High Resolution, Digital, Aerial Photogrammetric Analysis of Historical Shoreline Change and Net Sediment Transport Along the Kihei Coast of

By John J. B. Rooney and Charles H. FletcherMaui Hawaii, John J. B. Rooney and Charles H. Fletcher

Abstract

This study examines historical shoreline change in southwestern Maui, Hawaii based on orthophotos for seven years between 1949 and 1997 and NOAA T-sheet shorelines from 1900 and 1912. A reweighted least squares (RLS) regression is applied to the most recent trend in the data to calculate average annual erosion hazard rates and delineate the 30 year erosion hazard area. Historical movement of the vegetation line and beach step crest is used to estimate net sediment transport. Between 1912 and 1949 the southern coastline of the study site receded rapidly, an average of 1.8 m yr · t • In successively later time intervals the focus of erosion migrated northward. Some of the eroded sediment may have been deposited in the northern part of the site, which accreted three times more sediment than was eroded from the south. Significant net sediment transport to the north had occurred by 1912, prior to extensive known anthropogenic disturbance of the shoreline. Net accretion, and timing o

Year: 2014
OAI identifier: oai:CiteSeerX.psu:10.1.1.464.3005
Provided by: CiteSeerX
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