The turbidity maximum in the Tamar estuary

1993 ◽  
Vol 27 (2-4) ◽  
pp. 121-133 ◽  
Author(s):  
E. J. Darbyshire ◽  
J. R. West
Keyword(s):  
Turbidity Maximum ◽  
Tamar Estuary

Chemical Composition of Suspended Particles in an Estuarine Turbidity Maximum Zone

1983 ◽  
Vol 40 (S1) ◽  
pp. s201-s206 ◽  
Author(s):  
D. H. Loring ◽  
R. T. T. Rantala ◽  
A. W. Morris ◽  
A. J. Bale ◽  
R. J. M. Howland
Keyword(s):  
River Flow ◽  
Suspended Particle ◽  
Suspended Particles ◽  
Turbidity Maximum ◽  
Estuarine Turbidity Maximum ◽  
Tamar Estuary ◽  
Correlation Matrices ◽  
Spatial Differences ◽  
Chemical Conditions ◽  
High River Flow

The detrital and nondetrital elemental compositions of suspended particles in the Tamar Estuary, U.K., have been examined when the estuarine turbidity maximum was well developed and also when high river flow restricted the development of a turbidity maximum. Correlation matrices and 'r'-mode factor analyses were used to identify significant relationships within and between the variances in the fractionated particulate compositions and in the ambient physico-chemical conditions. Marked temporal and spatial differences in the elemental composition of suspended particles were found. At high river flow, suspended particulate compositions throughout the estuary were dominated by dilution and dispersion of an overwhelming flux of riverborne material. Under normal conditions of low riverine particle flux, internal cycling of particles, especially within the turbidity maximum region, controlled the spatial distributions of suspended particle compositions and subsidiary inputs were of greater significance.Key words: estuaries, suspended sediment, particle transport, trace elements

Sorption Behaviour of Waste-Generated Trace Metals in Estuarine Waters

1988 ◽  
Vol 20 (6-7) ◽  
pp. 113-121 ◽  
Author(s):  
G. A. Glegg ◽  
J. G. Titley ◽  
G. E. Millward ◽  
D. R. Glasson ◽  
A. W. Morris
Keyword(s):  
Specific Surface ◽  
Toxic Metal ◽  
Nitrogen Adsorption ◽  
Turbidity Maximum ◽  
Tamar Estuary ◽  
Sorption Behaviour ◽  
Surface Areas ◽  
Adsorption Desorption ◽  
Mn Oxides

Samples of suspended particles have been collected from the turbidity maximum region of the Tamar Estuary, S.W. England. Specific surface areas and porosities of the particles were determined by a BET nitrogen adsorption technique. The role of surface coatings of organic matter and Fe and Mn oxides was examined. The data show that the specific surface area was highest at the turbidity maximum and was associated with high Fe/Mn ratios. The characterised particles were then used in time-dependent adsorption-desorption experiments, with waters from the metal-rich Carnon River, S.W. England. The rates and extents of the sorption processes were interpreted in terms of a two-stage reaction which was related to the microstructures of the particles. Kinetic analyses of the desorption profiles gave rate constants which are of significance in the prediction of the fate of toxic metal wastes discharged into estuaries.

Nature of the Turbidity Maximum in the Tamar Estuary, U.K.

1993 ◽  
Vol 36 (5) ◽  
pp. 413-431 ◽  
Author(s):  
R.J. Uncles ◽  
J.A. Stephens
Keyword(s):  
Turbidity Maximum ◽  
Tamar Estuary

Accumulation of muds and metals in the Hudson River estuary turbidity maximum

1998 ◽  
Vol 34 (2-3) ◽  
pp. 214-222 ◽  
Author(s):  
M. G. Menon ◽  
R. J. Gibbs ◽  
A. Phillips
Keyword(s):  
River Estuary ◽  
Hudson River ◽  
Turbidity Maximum ◽  
Hudson River Estuary

scholarly journals The Response of Turbidity Maximum to Peak River Discharge in a Macrotidal Estuary

Water ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 106
Author(s):  
Yuhan Yan ◽  
Dehai Song ◽  
Xianwen Bao ◽  
Nan Wang
Keyword(s):  
River Discharge ◽  
Recovery Time ◽  
Morphological Evolution ◽  
Spring Tide ◽  
River Estuary ◽  
Sediment Concentration ◽  
Ocean Model ◽  
Turbidity Maximum ◽  
Sediment Supply ◽  
Three Dimensional Model

The Ou River, a medium-sized river in the southeastern China, is examined to study the estuarine turbidity maximum (ETM) response to rapidly varied river discharge, i.e., peak river discharge (PRD). This study analyzes the difference in ETM and sediment transport mechanisms between low-discharge and PRD during neap and spring tides by using the Finite-Volume Community Ocean Model. The three-dimensional model is validated by in-situ measurements from 23 April to 22 May 2007. In the Ou River Estuary (ORE), ETM is generally induced by the convergence between river runoff and density-driven flow. The position of ETM for neap and spring tides is similar, but the suspended sediment concentration during spring tide is stronger than that during neap tide. The sediment source of ETM is mainly derived from the resuspension of the seabed. PRD, compared with low-discharge, can dilute the ETM, but cause more sediment to be resuspended from the seabed. The ETM is more seaward during PRD. After PRD, the larger the peak discharge, the longer the recovery time will be. Moreover, the river sediment supply helps shorten ETM recovery time. Mechanisms for this ETM during a PRD can contribute to studies of morphological evolution and pollutant flushing.

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