CoastErosionCheck

Kekaha, HI Coastal Erosion Rate

Is the coast eroding 1.1 miles west of Kekaha, HI?

No significant trend

Nothing alarming measured 1.1 miles west of Kekaha, 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 this reading actually covers

Kekaha, HI is the nearest named place, 1.1 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: 21.97, -159.73. 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.

What backs this reading up

Averaging 63 separate transects produced this segment's rate, with 100% individually reading as erosion, rather than relying on any single survey line. The published margin on this reading runs ±1 ft/yr. The unadjusted figure here, -0.38 ft/yr, would place it 361 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. Dover Beaches South, NJ sits at national rank 994 for growth (0.4 ft/yr), one reference point among the 1211 scored segments, 5036 miles from here. 2 miles up the coast, Kekaha, HI shows the same lack of a significant trend.

Not this whole stretch, just Kekaha itself: the Coastal Change Hazards Portal is USGS's own live version of this data.