It has studied mixing processes in a estuary affected by AMD during a biannual sampling corresponding to
2003-2004. The mixture between fresh masses waters to pH 2 with marine waters to pH 8 introduces in
the system a mixing process salty induced and a mixing process pH induced. A space displacement of the
processes in the interior of the estuary has been demonstrated. Thus during dry stations the mixing processes
take place in the most internal zones of the estuary, whereas in wet stations, these processes take place
towards sectors more outward