Data Series 566

Before and After Images–Atchafalaya River Delta, (Landsat 5 Thematic Mapper Satellite Imagery)

Recent marsh burns Little Wax Bayou Little Wax Bayou Wax Lake Outlet Shaffer Bayou Aquatic vegetation Wax Lake Outlet Shaffer Bayou

Lake Salve Floating Lake Salve aquatic vegetation Hog Bayou Hog Bayou Surge-expanded ponds with

Recent marsh burns surge-removed aquatic vegetation Wax Bayou Wax Surge-formed or surge-expanded ponds

Avoca Cutoff Avoca Cutoff

Surge flow Hurricane Lili (Oct. 26, 2002) surge-formed pond Wrack

Wax Lake Wax Lake

r Delta r Delta

e e

v v

i i

R R

Wrack a

Hurricane Andrew a y (Aug. 26, 1992) y

a a

l l

surge-formed ponds a a

f f Surge flow a a

h h

c c t t

A A Partially exposed flats surge-scoured flats with wrack surge-removed vegetation Aquatic vegetation

Palmetto Bayou Palmetto Bayou Atchafalaya River Atchafalaya River Delta Delta Land creation projects from dredge material

u u o o y y a Reactivated and expanded a B B Surge-formed and surge-expanded b b Plum surge-formed Plum ponds caused by ponds from prior hurricanes (Aug. 26, 1992) Atchafalaya Bay Atchafalaya Bay Ponds were reactivated again by Wrack hurricanes Lili (Oct. 3, 2002), and Rita (Sep. 23 2005)

Land creation projects from dredge material February 27, 2008, Landsat 5 TM October 8, 2008, Landsat 5 TM Hourly water elevation 1.9 m, station datum, 11:00 am Local Standard Time (LST), Grand Isle, Louisiana, NOAA station ID 8761724. Hourly water elevation 2.2 m, station datum, 11:00 am Local Standard Time (LST), Grand Isle, Louisiana, NOAA station ID 8761724. N Atchafalaya River stage at Morgan City 1.3 m, 8:00 am LST, Morgan City USACE gage 03780. Atchafalaya River stage at Morgan City 0.96 m, 8:00 am LST, Morgan City USACE gage 03780. Minimal aquatic vegetation present in late February.

Image Source: U.S. Department of the Interior Contact Information: John Barras ([email protected]) or Landsat 5 Thematic Mapper Satellite Imagery is provided by the USGS EROS Data Center. U.S. Geological Survey John Brock ([email protected]) -2 0 22 4 6 8 Kilometers Bands 4 (near-IR), 5 (mid-IR), and 3 (visible red) are displayed.