Kalaeloa, HI Coastal Erosion Rate
What USGS measures 1.1 miles southeast of Kalaeloa, HI
The coast 1.1 miles southeast of Kalaeloa, 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 "Kalaeloa" 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 Kalaeloa, HI into one ~3.5-mile reading rather than picking a single arbitrary line to represent the area. Centered near 21.30°N, 158.05°W. USGS's Hawaii assessment last surveyed this stretch through 2007-2010, computing the rate with its WLR method. Other US regions were surveyed in different years, sometimes decades apart, so this page states its own rather than implying one national vintage.
How solid is this number
200 transects feed this segment's number; 56% of them individually measured retreat. The published margin on this reading runs ±0.15 ft/yr. Taken at face value, this segment's raw -0.03 ft/yr reading would land it 743 of 1211 nationally - a number worth ignoring, since it's statistical noise rather than a real trend. Source: USGS Open-File Report 2011-1009. Rank 1043 nationally for growth belongs to Inwood, NY, 4980 miles from this stretch, measured at 0.59 ft/yr. Kalaeloa, HI, 2.3 miles off, is the adjacent measured stretch, itself no significant trend.
One address near Kalaeloa: the Coastal Change Hazards Portal zooms past this stretch to the underlying map.