INVESTIGADORES
PICCOLO Maria Cintia
congresos y reuniones científicas
Título:
Internal seiches in the Quequén River Estuary, Argentina
Autor/es:
PERILLO, G.M.E.; PICCOLO, M.C.
Lugar:
Birmingham, Inglaterra
Reunión:
Congreso; XXII General Assembly International Association for the Physical Sciences of the Ocean; 1999
Institución organizadora:
International Association for the Physical Sciences of the Ocean
Resumen:
Quequén River Estuary is one of the largest of the Buenos Aires Province (Argentina)
containing one of the most important grain and fisheries harbour of the country. The last 2000
m of the estuary have been dredged to 12 m to accommodate the large cargo vessels. The
average river headward of the dredging border is almost 4 m, which resulted in a 8 m step
between them.
Historical tidal records from the gage located at mid distance from the mouth and the step
present short period (3-25 min) fluctuations superimposed over the regular tide. These
fluctuations are almost permanent with and amplitude of 4-10 cm. However, there are examples
of large fluctuations up to 1.5 m that have produced serious consequences to loaded vessels.
Two tide gages sampling at 1-min interval were located at the mouth and at the step (on the
harbour side) for a period of 1 month. Although no major fluctuations occurred both gages have
registered the same fluctuations but displaced 3-6 min being earlier at the step. CTD data
gathered at 1.5 m depth for one tidal cycle presented a similar fluctuation that occurs at a strong
halocline that is present almost all the time at that depth.