Saturday, February 19, 2011

So where does Waikiki Beach’s sand come from?


We’ve heard countless stories and urban legends about sand being shipped over from all over the world to replenish Waikiki’s famous stretch of beaches. It turns out  most of Waikiki’s sand comes from …Hawaii!

Even more interesting? The majority of Waikiki sand actually comes from just offshore.


Erosion and rising sea levels have swallowed a foot of Waikiki Beach annually since 1985. This phenomenon, while accelerated in the last few decades, is nothing new. Reports from the 1920s and 1930s reveal that sand was brought in from Manhattan Beach, California, via ship and barge, to Waikiki Beach. Importation of sand into Hawaii ceased in the 1970s.
 
Recently, sand has been pumped from neutral areas of the ocean floor some 2,000 feet off Waikiki to fill in the shrinking beach.

Before that, Waikiki’s sand was trucked from various points around Hawaii including Oahu's North Shore—in particular, Waimea Bay Beach and a sand bar off the town of Kahuku—and Papohaku Beach on Molokai.

While it’s true that some sand is brought into Hawaii from places like Australia, Polynesia and even China, it serves more utilitarian purposes—namely construction and filling sand traps on Hawaii’s golf courses.

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