The Ukumehame and Pāpalaua area (transects 0 – 142) extends from ʻAʻalaloloa Pali in the southeast to Ukumehame Gulch in the northwest. The shoreline is comprised of sandy and cobble beaches with several sections of hardened shoreline protecting Honoapiʻilani Hwy. Offshore is a fringing reef system and basaltic rock hard bottom. There are two beach parks in this area: Ukumehame and Pāpalaua. These parks provide convenient features for description purposes.
The entire area, on average, has experienced moderate erosion since 1912 with an average rate of -0.7 ft/yr. The western portion (transects 75 – 142) of the area includes Ukumehame Beach Park. This section of shoreline has experienced moderate erosion over time with an average rate of -0.6 ft/yr. The eastern portion of the area (transects 0 – 70) includes Pāpalaua State Wayside Park. This section of shoreline shows an average rate of -0.8 ft/yr. Between Ukumehame Beach Park and Pāpalaua State Wayside Park, abutting the highway (transects 50 – 74) is a focus of significant shoreline erosion with an average rate of –1.9 ft/yr.
Last updated: July 2021
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