FLOOD-ORIENTED SAND WAVE 



MIGRATION 



MIDDLE GROUND 



PARKER RIVER ESTUARY 



EXPLANATION 



N = NEAP TIDE 



NS-NEW MOON SPRING TIDE 



FS-FULL MOON SPRING TIDE 



MEASURED MIGRATION 

 INTERPRETED CURVE 



Figure 17. Flood-Oriented Sand Wave Migration, Middle 

 Ground Flood-Tidal Delta, Parker Estuary. 

 Plots indicate distance of slipface migra- 

 tion, at any given date, from a permanent 

 marker stake. The curves show that major 

 slipface migration occurs during full-moon 

 tides. 



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