Hauula, HI Coastal Erosion Rate
Is the coast eroding 0.9 miles southeast of Hauula, HI?
Nothing alarming measured 0.9 miles southeast of Hauula, 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.
The grain of this number
Hauula, HI is the nearest named place, 0.9 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: 21.60, -157.90. 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.
How solid is this number
Averaging 343 separate transects produced this segment's rate, with 65% individually reading as erosion, rather than relying on any single survey line. USGS's confidence interval here is ±0.16 ft/yr. The unadjusted figure here, -0.04 ft/yr, would place it 730 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. Dana Point, CA sits at national rank 1006 for growth (0.44 ft/yr), one reference point among the 1211 scored segments, 2576 miles from here. Punaluu, HI, 2.7 miles off, is the adjacent measured stretch, itself no significant trend.
One address near Hauula: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.