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Sediment Transport
 Physical Processes
The  behaviour of sediment layering in the water column is determined by the dynamic response of the concentration profile to forcing by currents and waves. Both deposition- and erosion-related processes are controlled by the hydrodynamic bed shear stress acting at bed level.
Biological consequences
The high organic matter content especially in estuaries and the high biological productivity of sediments results in sediment exerting a demand for dissolved oxigen from overlaying waters. The deposition of nutrient rich organic detritus and its subsequent biological decomposition means that sediments act as both a sink and source of nutrients.
Tagus Estuary
 TejoSedEulSmall.jpg (3052 bytes)       TejoSedPartSmall.jpg (6457 bytes)
Sado Estuary
 Sadosmallviva_morta.gif (9262 bytes)
Guia - Cascais
 GuiaOnda3SedPartSmall.jpg (2985 bytes)