Well, the levee was constructed in 1983. Weirs went into operation 1989. 1988 was the closest date to those two to show any difference. If you look at 1956 to 1978 land loss (1978 was the only year in between '56 and '88 that was analyzed), the rate of loss was approximately 4639 acres per year. From 78 to 88, it was about 500 per year then.
I don't know where you're going to get a land loss analysis for the last 6 years. I haven't seen one. The sabine/calcasieu basin lost approximately 14,000 acres of land based on Barras's (2006) estimate of land loss after Hurricanes Rita and Katrina. There is another Barras publication from 2009, but it analyzes landloss over the entire Chenier plain and not by watershed.
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