User talk:Gaianauta

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[edit] Limit between sea and river

To complete the article 'pole of inaccessibility' I need some info on how to define the boundary between river and ocean at river mouths. Where does the river end in an estuary? Where does the ocean start? Any kind of documentation or hints on this would really help, thanks. Post answers at my user page: User_talk:Andres72 or in the article itself. Andres72 22:30 21 mar 2007 (CET)