INVESTIGADORES
PICCOLO Maria Cintia
congresos y reuniones científicas
Título:
Internal Waves in Highly Stratified Quequén River Estuary, Argentina.
Autor/es:
PERILLO, G.M.E.; PEREZ, D.E.; PICCOLO, M.C.
Lugar:
Seattle
Reunión:
Conferencia; 17th Biennial Conference of the Estuarine Research Federation; 2003
Institución organizadora:
Estuarine Research Federaion
Resumen:
Data gathered at the Quequén River Estuary (Argentina)from tidal records indicate the continuous presence of       fluctuations with periods of 3 to 25 min and amplitudes from 5-30 cm on top of the tidal signal. The present study       coincide with an extraordinary river discharge which enhanced the stratification always present at the       harbor.Current velocity and CTD were measured at 75 cm depth during a tidal cycle with a sampling rate of 1s.       At the same time,a CTD with an OBS adapted to it was deployed at 4m below the surface to register       continuous,CTD and suspended sediment concentration at 1s interval. Every 30m CTD vertical profiles were       made.Simultaneous tidal records(1 min interval)were obtained at the mouth and the head of the harbor. Salinity       profiles showed a strong stratification, going from freshwater at the surface with high suspended load,while       highly saline, water was found at the bottom. Velocities at the surface showed long period fluctuations which       correspond to the presence of internal waves. Fluctuations were characterized,and fundamental peaks were       determined. Also a double coupling second order interaction has been found between the most energetic       frequencies giving subarmonic energy peaks. This fluctuations may be related to the geomorphologic effect       produced by an artificial step made by the dredging of the harbor upon the interaction between the river