Mokuleia, HI Coastal Erosion Rate
Is the coast eroding 1.4 miles east of Mokuleia, HI?
The coast 1.4 miles east of Mokuleia, HI shows no statistically significant trend either way. USGS's transects measured a rate here, but it's smaller than the survey's own margin of error for this stretch, so calling it "eroding" or "growing" would overstate what the data actually shows.
What "Mokuleia" means on this page
Nothing here is parcel-level. USGS's raw transects run every few hundred feet along the shore; this page averages the ones nearest Mokuleia, HI into one ~3.5-mile reading rather than picking a single arbitrary line to represent the area. Centered near 21.58°N, 158.15°W. The survey behind it runs to 2007-2010, in USGS's Hawaii assessment, using the WLR method. Shoreline surveys aren't repeated every year, so this is the most recent long-term measurement USGS has published for this coast, not a live reading.
How solid is this number
271 transects feed this segment's number; 62% of them individually measured retreat. The published margin on this reading runs ±0.12 ft/yr. Taken at face value, this segment's raw -0.04 ft/yr reading would land it 731 of 1211 nationally - a number worth ignoring, since it's statistical noise rather than a real trend. Source: USGS Open-File Report 2011-1009. Surfside Beach, TX sits at national rank 1059 for growth (0.69 ft/yr), one reference point among the 1211 scored segments, 3917 miles from here. 3.2 miles up the coast, Mokuleia, HI shows 0.13 ft/yr of eroding.
Mokuleia, HI on the source map: try the Coastal Change Hazards Portal, zoomable well past this page's ~3.5-mile grain.