Kamokuʻākulikuli, also known as Sand Island, is a man-made barrier island on the southern shoreline of Oʻahu. The island was constructed in the 1940’s by depositing coral and sand dredge material on a shallow reef (Clark 2005). The beaches at Sand Island State Recreation Area (transects 0 – 27) are divided into two sections by a short area of hard shoreline (between transects 16 and 18). The remainder of the southern shoreline of Kamokuʻākulikuli is composed of rock breakwalls, except for a small beach constructed near the eastern end between 1982 and 2005. The coast in this area is exposed to refracted easterly trade wind waves and seasonal swell during summer months.
The eastern section of Kamokuʻākulikuli beach is accreting at moderate to high rates (up to 0.8 ft/yr around transect 14). The west section is eroding with the highest erosion at the far west end around transect 26 (-1.6 ft/yr).
Last updated: July 2021
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