Estuarine turbidity maximum?
Strong tidal forces push salinity upriver beneath the outflowing
river water. The turbulence caused by this tidal forcing results in
resuspension of sediment and other particulate material present on
the river bed. Concurrently, dissolved material in the river water
flocculates when it comes into contact with the salt wedge pushing
its way upriver. The combination of these two processes results in
elevated levels of suspended particulate material: the estuarine
turbidity maximum (ETM). Within the region of the ETM, material in
the water column, and on the bed of the estuary, is trapped,
resuspended and advected. ETMs vary in strength and distance they
move with the tides depending on the strength of the tide and the
flow of the river. Hope this helps!