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Shell fragments as indicators of bed sediment transport in the Tay Estuary

Published online by Cambridge University Press:  05 December 2011

M. A. M. Al-Dabbas  and
J. McManus
M. A. M. Al-Dabbas
Affiliation:
Water Resources Dept, Scientific Research Council, Baghdad, Iraq
J. McManus
Affiliation:
Department of Geology, University of Dundee, Dundee DD1 4HN, Scotland
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Synopsis

The sediments of the floor of the Tay Estuary are dominated by assemblages of quartzo-feldspathic sands, although pebbles and silts are locally important. The sands are principally of inorganic materials, but they include shell fragments which account for up to 25% of the material, depending upon locality.

Detailed analyses of the shell components of the 0.3–1.2 mm size fraction (400 particles from each site) in the area between Balmerino and Monifieth Bay reveal the presence of much molluscan debris (identified as mature and immature bivalves and gastropods), with significant proportions of bryozoan, barnacle or echinoderm skeletal fragments according to locality. Ostracoda and foraminifera are less common. The shelly material occurs mostly within zones inhabited by the same living organisms.

The characteristic blue-coloured Mytilus edulis shell fragments are also recognised up to 6 km landwards of the westernmost known colonies, along the railway bridge.

Shell matter is dissimilar in shape and surface texture to the clastic grains and large shell fragments are frequently associated with sand sized inorganic sediments, which have been shown in flume experiments to respond in a similar manner to hydraulic controls.

The Mytilus is therefore suitable for use as a natural tracer. It indicates up-estuary net residual motion of sediments in the middle and upper reaches. This pattern confirms evidence from heavy mineral assemblages that North Sea derived sands enter the estuary and migrate westwards to accumulate on the upper estuarine tidal flats.

Type
Research Article
Information
Proceedings of the Royal Society of Edinburgh, Section B: Biological Sciences , Volume 92 , Issue 3-4: The Environment of the Tay Estuary , 1987 , pp. 335 - 344
Copyright
Copyright © Royal Society of Edinburgh 1987

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References

Adair, J. 1683. The mappe of Straithern, Stormont and the Cars of Gourie, with the rivers Tay & Em.Google Scholar
Al-Ansari, N. A., Al-Jabbari, M. H. & McManus, J. 1978. Sediment discharge in the River Almond, Scotland. Iraqi Journal of Science 19, 145–160.Google Scholar
Al-Ansari, N. A. & McManus, J. 1979. Fluvial sediments entering the Tay Estuary: 1. Sediment discharge from the River Earn. Scottish Journal of Geology 15, 203–216.Google Scholar
Al-Dabbas, M. A. M. 1980. An examination of shell fragment distributions and geochemical features of Mytilus edulis in the Tay Estuary. Unpublished Ph.D. Thesis, University of Dundee.Google Scholar
Alexander, W. B., Southgate, B. A. & Bassindale, R. 1935. Survey of the River Tees Pt. II. The estuarychemical and biological. Technical Paper on Water Pollution Research D.S.I.R. 5.Google Scholar
Al-Jabbari, M. H., McManus, J. & Al-Ansari, N. A. 1980. Sediment and solute discharge into the Tay Estuary from the River System. Proceedings of the Royal Society of Edinburgh 78B, 15–32.Google Scholar
Allen, G. P., Sauzay, G., Castaing, P. & Jouanneau, J. M. 1977. Transport and deposition of suspended sediment in the Gironde estuary. In Estuarine Processes, ed. Wiley, M., pp. 63–82. New York: Academic Press.Google Scholar
Al-Mansi, A. M. A. 1986. Sediments, sediment transport and beach erosion in Monifieih Bay, Tay Estuary, Scotland. Unpublished Ph.D. Thesis, University of Dundee.Google Scholar
Buller, A. T. 1975. Sediments of the Tay Estuary II: Formation of ephemeral zones of high suspended sediment concentrations. Proceedings of the Royal Society of Edinburgh 75B, 65–89.Google Scholar
Buller, A. T., Charlton, J. A. & McManus, J. 1972. Data from physical and chemical measurements in the Tay Estuary for neap and spring tides, June 1972. Dundee: Tay Estuary Research Report No. 2, University of Dundee.Google Scholar
Buller, A. T. & McManus, J. 1975. Sediments of the Tay Estuary 1: Bottom sediments of the upper and upper middle reaches. Proceedings of the Royal Society of Edinburgh 75B, 41–64.Google Scholar
Charlton, J. A. 1980. The tidal circulation and flushing capability of the outer Tay Estuary. Proceedings of the Royal Society of Edinburgh 78B, 33–46.Google Scholar
Crickmore, M. J. 1967. Measurement of sand transport in rivers with special reference to tracer methods. Sedimentology 8, 175–193.Google Scholar
de Vries, M. 1973. Applicability of fluorescent tracers. In Tracer techniques in sediment transport, I.A.E.A. Vienna Technical Report 145, 105 123.Google Scholar
Duane, D. B. 1970. Synoptic observations of sand movement. Proceedings of the Coastal Engineering Conference 2, 799.Google Scholar
Duane, D. B. & James, W. R. 1980. Littoral transport in the surf zone elucidated by an Eulerian sediment tracer experiment. Journal of Sedimentology and Petrology 50, 929–942.Google Scholar
Einstein, H. A. & Krone, R. B. 1961. Estuarial transport patterns. Journal of the Hydraulics Division, American Society of Civil Engineers 87, 51–82.Google Scholar
Folk, R. L. 1974. Petrology of sedimentary rocks. Austin: Hemphills.Google Scholar
Green, C. D. 1975. Sediments of the Tay Estuary III. Sedimentological and faunal relationships on the southern shore at the entrance to the Tay. Proceedings of the Royal Society of Edinburgh 75B, 91–112.Google Scholar
Guilcher, A. 1967. Origin of sediments in estuaries. In Estuaries, ed. Lauff, G. H., pp. 149–157. Washington D.C.: American Association for the Advancement of Science.Google Scholar
Huang, Z., Yuan, X., Chen, S. & Qin, H. 1986. The experimental investigation for the improvement of Modamen Outlet of the Pearl River estuary in China. In River Sedimentation, eds Wang, S. Y., Shen, H. W. & Ding, L. Z., pp. 542–551. Jackson: University of Mississippi.Google Scholar
Ingle, J. C. & Gorsline, D. S. 1973. Use of fluorescent tracers in the nearshore environment. In Tracer techniques in sediment transport. I.A.E.A. Vienna Technical Report 145, 125–148.Google Scholar
Khayrallah, N. & Jones, A. M. 1975. A survey of the benthos of the Tay Estuary. Proceedings of the Royal Society of Edinburgh 75B, 113–135.Google Scholar
McManus, J. 1972. Estuarine development and sediment distribution with particular reference to the Tay. Proceedings of the Royal Society of Edinburgh 71B, 97–113.Google Scholar
McManus, J. 1979. Sediments in estuaries. In Tidal Power & Estuary Management, eds Severn, R. T., Dinely, D. & Hawkes, L. E., pp. 180–187. Bristol: Scientechnica.Google Scholar
McManus, J., Buller, A. T. & Green, C. D. 1980. Sediments of the Tay Estuary VI. Sediments of the lower and outer reaches. Proceedings of the Royal Society of Edinburgh 78B, 133–154.Google Scholar
McMaster, R. L. & Garrison, L. E. 1966. Mineralogy and origin of northern New England shelf sediments. Journal of Sedimentology and Petrology 36, 1131–1142.Google Scholar
Meade, R. H. 1982. Sources, sinks and storage of river sediment in the Atlantic drainage of the United States. Journal of Geology 93, 235–252.Google Scholar
Mishra, S. K. 1969. Heavy mineral studies of the Firth of Tay region (Scotland). Journal of the Geological Society of the University of Saugar 5, 37–49.Google Scholar
Nichols, M. M. 1972. Sediments of the James River estuary, Virginia. Memoirs of the Geological Association of America 133, 169–212.Google Scholar
Nichols, M. M. 1986. Storage efficiency of estuaries. In River Sedimentation, eds Wang, S. Y., Shen, H. W. & Ding, L. Z., pp. 273–289. Jackson: University of Mississippi.Google Scholar
Powers, M. C. 1953. A new roundness scale for sedimentary particles. Journal of Sedimentology and Petrology 23, 117–119.Google Scholar
Stevenson, R. 1834 Survey of the River Tay in reference to the improvement of its navigation and the extension of the Harbour at Perth. Perth: Report, Perth City Engineer.Google Scholar