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Fluvial contribution to the sediment budget of the Tay Estuary, Scotland, assessed using mineral magnetic fingerprinting

Fluvial contribution to the sediment budget of the Tay Estuary, Scotland, assessed using mineral magnetic fingerprinting

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Original languageEnglish
TitleSediment budgets
Subtitleproceedings of the International Symposium on Sediment Budgets : held during the Seventh Scientific Assembly of the International Association of Hydrological Sciences (IAHS) at Foz do Iguaço, Brazil, 3-9 April, 2005
EditorsDes E. Walling, Arthur J. Horowitz
Place of publicationWallingford
PublisherInternational Association of Hydrological Sciences (IAHS)
Publication date2005
Pages134-140
Number of pages7
Volume1
ISBN (Print)9781901502879
StatePublished

Publication series

NameIAHS publication
Number291
ISSN (Print)0144-7815

Conference

ConferenceSeventh Scientific Assembly of the International Association of Hydrological Sciences
CountryBrazil
CityFoz do Iguaço
Period3/04/059/04/05

Abstract

The sediment budget of the Tay Estuary, Scotland, UK, was evaluated using mineral magnetic fingerprinting. A multivariate unmixing model, based on constrained linear programming, permitted quantification of source contributions to the estuarine bottom sediments. Factor and multivariate discriminant analysis demonstrated that the two fluvial sources could be separated on the basis of five, linearly additive magnetic properties. However, lack of data dimensionality necessitated amalgamation of the two marine sources originally recognized. The model demonstrates the present-day dominance of marine bottom sediment derivation (78 ± 10%), whereas fluvial source contributions are 4 ± 10% from the River Earn and 18 ± 10% from the River Tay. The fluvial contribution should be considered in the context of the Tay being Britain’s foremost river in terms of discharge (long-term average ~ 167 m3 s-1). Source contributions to intertidal flat sediments collected over a spring–neap tidal cycle imply a temporal constancy to bed sediment provenance.

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