Some scientists think Waikiki Beach could disappear even sooner.
As the seas rise because of climate change, 70% of all sandy shorelines on Oahu, Maui and Kauai are chronically eroding. Thirteen miles of their beaches have already been lost to erosion in the past century.
, studies have found. And, especially on beaches with steep slopes, every visitor pushes a little more sand into the sea.into maintaining Waikiki Beach, including “beach nourishment,” hauling in tons of sand from other sources and placing it on the beach. It’s a short-term, unsustainable solution. “In Waikiki, without beach nourishment, we would expect the beach to completely disappear in 20 to 30 years,” says Eversole. That would be devastating for an economy that depends on tourism — visitors spentin 2019. The state predicts losing Waikiki Beach would mean a loss of $2.22 billion a year.
. On Oahu, this equates to flooding of approximately 3,800 structures, including hotels in Waikiki, as well as 18 miles of roads. More than 13,000 residents would be displaced.
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