Apparent sea-level rise at the Bayou Rigaud tide gauge located near Grand isle was 

 1.3 cm/yr from 1954 to 1980 (Figure 3). Apparent sea-level rise includes both the effects 

 of subsidence of land, and a global, real rise in sea level which is referred to as eustatic 

 sea-level rise. 



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1954 



1960 



1970 

 YEARS 



1980 



Figure 3. Apparent sea-level rise and mean sedimentation rates for stream- 

 side and inland saline marshes in the lower Barataria estuary. 



