Suspended sediment dynamics in Cochin estuary, West coast, India

Show simple item record Vinita, J. Revichandran, C. Manoj, N.T. 2017-09-27T13:09:26Z 2017-09-27T13:09:26Z 2017
dc.identifier.citation Journal of Coastal Conservation, vol.21(1); 2017; 233-244
dc.description.abstract An observational study was conducted in Cochin estuary to examine the relative impacts of tidal and river runoff forcing upon suspended sediment dynamics at different time scales. Time series measurements of salinity and suspended sediment concentration (SSC) were conducted at spring and neap periods of wet and dry seasons. These data were complemented by measurements of tides, currents, vertical profiling of hydrography and turbidity at the main inlet of the estuary. The results showed that SSC was maximum at the main inlet and decreased towards upstream for both seasons. The intra-tidal variations of water column stability suggested that prominent stratification occurred at the main inlet as a result of torrential rain during spring tides of wet season. During neap tides of wet season, the runoff was relatively lower and intense turbulent mixing occurred during the ebb. During dry season, well-mixed (spring) and partially stratified (neap) conditions were noticed. Suspended sediment fluxes were also analyzed using the decomposition method to identify mechanisms of turbidity maintenance at the inlet. The fluxes were dominated by an advective component during both tidal phases of wet season and dry-neap period. In contrast, the tidal pumping was the main contributing process for residual fluxes during the dry-spring period. The residual sediment transport at the inlet was directed outward irrespective of tidal ranges and seasons due to the strong ebb currents with longer duration. These findings are significant for the development and protection of harbors situated close to the inlet in estuaries and for the efficient implementation of an integrated coastal management system
dc.language.iso en
dc.publisher Springer
dc.rights An edited version of this paper was published by Springer. This paper is for R & D purpose and Copyright [2017] Springer.
dc.subject Oceanography and limnology
dc.subject Geology and geophysics
dc.subject Geology and geophysics
dc.subject Oceanography and limnology
dc.title Suspended sediment dynamics in Cochin estuary, West coast, India
dc.type Journal Article

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