Tidal and longshore sediment transport associated to a coastal structure.

CUADRADO D. G.; GÓMEZ E.A.; GINSBERG S.S

ESTUARINE COASTAL AND SHELF SCIENCE

Elsevier

Año: 2005 vol. 62 p. 291 - 300

0272-7714

In order to understand the subtidal marine dynamics relative to the coastal engineering works in the Bahý´ a Blanca Estuary (Argentina), the balance of sediment transport caused by tidal currents was estimated in the Puerto Rosales area and compared with the predicted potential littoral transport. The breaking wave height used in the littoral drift calculation was estimated after applying di.erent wave transforming procedures over the deepwater wave which was predicted by the occurrence of predominant wind, blowing long enough in an essentially constant direction over a fetch. The e.ect of a breakwater on currents and circulation was studied by bathymetric and side-scan sonar records, sedimentology, and tidal current measurements. Di.erent modes of transport occur on either sides of the breakwater. On the east side, longshore transport is the principal mode, and on the west side, tidal transport is predominant.