Grand Isle 1978 



2km 



Timballer Island 1978 



1887 



1934 



2km 



Sand Transport 



Recurved Spit Position 

 Time Line 



Figure 12. Recurved spit morphology of Timbalier Island and Grand Isle indi' 

 cate the importance of the updrift sediment source in the Caminada-Moreau 

 coast (see Figure 10) . 



LATE LAFOURCHE BARRIER SYSTEM 

 SHORELINE CHANGES 1887- 1978 



"^^ ^^-**,iiafc 



:--'-■:::■'''--' ' Bay 



Bdy w Champagne 



Marchand '^ 



f.'-^' GB'^ND ISLE 

 L Groins - 



.o»^ 



CAMlN^O* 



1*0 



^i' 



Figure 13. A historical map comparison between 1887 and 1978 showing rapid 

 shoreline retreat along the Caminada-Moreau coast and lateral migration of 

 the flanking barriers of Grand Isle and Timbalier Island. 



27 



