INVESTIGADORES
PERILLO Gerardo Miguel E.
congresos y reuniones científicas
Título:
Internal seiches in the Quequén River Estuary, Argentina
Autor/es:
PERILLO, GERARDO M. E.; PICCOLO, M CINTIA
Lugar:
Birmingham
Reunión:
Congreso; XXII General Assembly International Association for the Physical Sciences of the Ocean,; 1999
Institución organizadora:
IAPSO
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 2000m of the estuary have been dredged to 12 m to accommodate the large cargo vessels. Theaverage river headward of the dredging border is almost 4 m, which resulted in a 8 m stepbetween them.Historical tidal records from the gage located at mid distance from the mouth and the steppresent short period (3-25 min) fluctuations superimposed over the regular tide. Thesefluctuations are almost permanent with and amplitude of 4-10 cm. However, there are examplesof 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 theharbour side) for a period of 1 month. Although no major fluctuations occurred both gages haveregistered the same fluctuations but displaced 3-6 min being earlier at the step. CTD datagathered at 1.5 m depth for one tidal cycle presented a similar fluctuation that occurs at a stronghalocline that is present almost all the time at that depth.