Louisiana Coastal Land Loss & Flood Risk

Louisiana swell— ft

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TempFlowChloroOff

WindCurrentsOff

◗ Chart◉ Satellite + seafloor◈ Live shoreline

Live shoreline · Sentinel-2

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Blue = water. Default is a 12-month median of every clear Sentinel-2 pass — the current mean shoreline. Slide left to step back through individual dated passes.

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—ft/yr long-term

—ft setback

—yr horizon

Blue overlay = today's satellite waterline. Rate & setback are the USGS long-term record for this parcel.

Ocean shore eroding

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long-term, USGS DSAS · Gulf of Mexico

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Eroding shore

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Fastest erosion

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Fastest gain

Long-term rate · m/yr (USGS DSAS)

−5 · erosion0 · held+20 · accretion

Marsh, delta & bays — not in the USGS sandy-shoreline record

Sea surface temp · JPL MUR · —

cooler°warmer

Colored line = USGS DSAS long-term shoreline-change rate (Gulf of Mexico, OFR 2010-1118/1119, Morton/Miller et al.), m/yr. Louisiana loses land faster than any coast in America — roughly 1,900 square miles gone since 1932 — as the leveed Mississippi starves the delta of sediment and the land itself sinks. Screening, not a survey.