Kaaawa, HI Coastal Erosion Rate
What USGS measures right at Kaaawa, HI
Nothing alarming measured right at Kaaawa, HI: whatever shift USGS's transects picked up here is too small to call reliably one way or the other, which this site reports as "no significant trend" rather than forcing a direction.
What "Kaaawa" means on this page
Kaaawa, HI is the nearest named place, 0.2 miles away, to a ~3.5-mile stretch of coast USGS has surveyed - the reading below covers that whole stretch, not a single property in it. Segment center: 21.55, -157.85. Survey years: 2007-2010, method WLR, from USGS's Hawaii shoreline-change assessment. That's how current the data is here, real, but not a live feed, since a shoreline survey is a major undertaking, not an annual check-in.
What backs this reading up
276 transects feed this segment's number; 62% of them individually measured retreat. Uncertainty on this specific number: 0.15 ft/yr either side. The unadjusted figure here, -0.05 ft/yr, would place it 713 of 1211 if ranked directly - but an unreliable rank isn't a useful one, which is exactly why "no significant trend" is the headline instead. Source: USGS Open-File Report 2011-1009. Rank 1133 nationally for growth belongs to Manzanita, OR, 2535 miles from this stretch, measured at 1.28 ft/yr. 2.3 miles up the coast, Kaaawa, HI shows the same lack of a significant trend.
One address near Kaaawa: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.