The Kahana study area (transects 1273 – 1381) extends from Māhinahina Point in the south to Haukoe Point in the north. The northern portion of the area is comprised of white sand beach separated by headlands. The south and central sections of the shoreline are dominated by Kahana Beach, a long white sand beach segmented by revetments. Sand fields and patches extend among basaltic rock hard bottom offshore.
As a whole, the area (transects 1273 – 1381) has experienced moderate erosion since 1912 with an average rate of -0.4 ft/yr. Kahana Beach (transects 1285 – 1350) is the largest beach in the area. It has experienced moderate erosion over time with an average rate reflecting the area trend (-0.5 ft/yr). To the north, the beach between Kaʻea and Kalaeokaiʻa Points (transects 1355 – 1364) has experienced light to moderate long-term accretion with an average rate of 0.4 ft/yr. The beach at Kalaeokaiʻa Point (transects 1365 – 1369) has remained relatively stable over the long term with an average rate of -0.2 ft/yr. The last beach in this area is located at Kaʻōpala (transects 1377 – 1381). This section of coast has also remained relatively stable over time with an average rate of –0.1 ft/yr.
Last updated: July 2021
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