For those of you who have an interest in the science behind the beach erosion on Maui, there are excellent scholarly articles, heres a quote from one: The National Assessment of Shoreline Change: Historical Shoreline Change in the Hawaiian Islands, a U.S.G.S. publication : The average long-term rate for all North Maui beaches, -0.26 ± 0.02 m/yr, is the most erosional average rate of any region on the three islands (table 5; approximately the same as West Oahu: -0.25 ± 0.01 m/yr). Average long-term rates for each of the North Shore subregions are erosional (see table 12 in the article). Eighty-seven percent of the transects along North Maui indicate a trend of erosion in the long term and 74 percent indicate a trend of erosion in the short term. The maximum erosion rate (-1.5 ± 1.1 m/yr) was found in front of an offshore rock bench at Baldwin Park (table 13). Shoreline recession at Baldwin is, in part, the result of sand-mining operations for a now-defunct lime kiln. A bench of beach rock was previously linked to the beach by a tombolo, but is now isolated offshore (Genz and others, 2009). Other areas of significant erosion were found at Waiehu Beach Park (up to -0.5 ± 0.3 m/yr, long term) and Kanaha Beach Park (up to -1.5 ± 0.7 m/yr, long term). The maximum long-term accretion rate (1.5 ± 1.3 m/yr) was measured between two groins at Kanaha Beach Park. Heres the link to the above excerpt: pubs.usgs.gov/of/2011/1051/pdf/ofr2011-1051_report_508_rev052512.pdf
Posted on: Sun, 13 Jul 2014 14:08:04 +0000
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