Evolving Understanding of the Tay Estuary, Scotland

Author(s):  
R. W. Duck
Keyword(s):  
2010 ◽  
Vol 4 (3) ◽  
pp. 273-274 ◽  
Author(s):  
A. G. Dawson ◽  
D. E. Smith ◽  
D. Long ◽  
Robin A. Cullingford ◽  
Christopher J. Caseldine ◽  
...  
Keyword(s):  

Author(s):  
J. McManus ◽  
S. A. K. Alizai

SynopsisIn the upper Tay Estuary the marshes bordering the northern intertidal mud-flats are dominated by Phragmites communis in the west, with Juncus gerardi becoming more important eastwards, where Aster tripolium is also significant. Sedimentation on the surface of the marshes at Kingoodie and Invergowrie has been measured at monthly intervals over a twenty-three month period, using stake implants to provide local marker levels. The marsh surfaces were at their greatest heights in early summer and fell during autumn and winter. Maximum accretion rates were measured in spring on the outer marshes at both sites, where net accretion over the entire period was greatest. The net accretion in the Phragmites marsh was 2.5 mm, in the Aster belt 5 mm, in established Juncus 9 mm and in newly colonising Juncus 8.7 mm, whereas on the adjacent Kingoodie mud flats there was net stability over the twenty-three-month interval. Accretion was less at Invergowrie (3–5 mm) than at Kingoodie (2.5–9 mm). Monthly analysis of the upper 0.5 cm of the surface sediments showed the Invergowrie marsh sediments to be sandier than those of Kingoodie. Silts and clays deposited on the outer marsh surface in spring migrate landward during the summer and autumn. The apparent annual net accretion varied greatly with the specific month used for comparison, with 13 mm net losses based on November figures and 10 mm gains using January data.


Author(s):  
J. A. Charlton

SynopsisMeasurements of tidal currents in the outer Tay Estuary, and from the hydraulic model of the estuary, are used to present a tidal atlas of the area and to deduce residual tidal circulation. Additional tests on the model show that the volumetric exchange rate with the sea of the outer estuary can be as high as 58 per cent per tide, but may be lowered to about 35 per cent if multiple tide recirculation is considered. Fresh water discharge into the estuary does not materially affect this exchange rate.


Author(s):  
M. H. Al-Jabbari ◽  
J. McManus ◽  
N. A. Al-Ansari

SynopsisThe River Tay, which drains a dominantly metamorphic catchment, has the largest freshwater discharge of any British river. Direct methods of determining the solute, suspension and bed loads at six gauging stations have enabled the river transport to be assessed at 375,000 and 997,000 tonnes annually for dry and average wet years respectively. Added to estimates of loads from the Earn and Isla rivers the load entering the head of the Tay Estuary varies from 646,000 tonnes to 1,648,000 tonnes annually. This corresponds to total losses of 100 t/km2/year to 255 t/km2 year, which equates with an average lowering of the basin surface by 4–5 cm to 11.6 cm per thousand years of dry and average conditions respectively.


2005 ◽  
Vol 26 (20) ◽  
pp. 4399-4404 ◽  
Author(s):  
G. Ferrier ◽  
J. T. Macklin ◽  
S. P. Neill ◽  
A. M. Folkard ◽  
G. J. M. Copeland ◽  
...  
Keyword(s):  

Author(s):  
D. J. A. Williams ◽  
V. Nassehi

SynopsisA one-dimensional mathematical model based on an implicit finite difference scheme is used to predict tidal levels and discharges throughout the Tay Estuary. The model accounts for the transformation of the tidal level curve along the estuary and predicts a maximum tidal range near Flisk. There is a measure of agreement between computed velocities and observed data in the upper reaches of the estuary.


Author(s):  
Alwin Gaertner

SynopsisAt ten stations in the upper Tay Estuary, surface water, bottom water and sediment samples were taken on 25 March 1976, 5/6 May 1977, 11 April 1978 and 6 June 1978, and investigated quantitatively for the presence of lower marine fungi, chytrids and higher mycelial fungi by means of the water-culture baiting method with pine pollen. The distribution of fungi is discussed as a function of the physical characteristics of the estuary.


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